CN101502156A - Method and apparatus for coordinating seamless channel switching in a mesh network - Google Patents
Method and apparatus for coordinating seamless channel switching in a mesh network Download PDFInfo
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- CN101502156A CN101502156A CNA2006800112829A CN200680011282A CN101502156A CN 101502156 A CN101502156 A CN 101502156A CN A2006800112829 A CNA2006800112829 A CN A2006800112829A CN 200680011282 A CN200680011282 A CN 200680011282A CN 101502156 A CN101502156 A CN 101502156A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/06—Reselecting a communication resource in the serving access point
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
- H04W36/0016—Hand-off preparation specially adapted for end-to-end data sessions
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/18—Self-organising networks, e.g. ad-hoc networks or sensor networks
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Abstract
A mesh network including at least one channel master (CM) and a plurality of mesh points (MPs). The CM sends a channel change intention message to at least one of the MPs indicating the CM's intention to change from a first channel to a second channel. Upon reception of the channel change intention message, the at least one MP determines whether to switch from the first channel to the second channel. The at least one MP sends a channel change response message to the CM. The CM then determines whether to change from the first channel to the second channel based on the channel change response message. The channel change intention message may indicate a change of mode, a change of bandwidth or a change of a number of channels. The channel change intention message may indicate the timing of the channel change.
Description
Technical field
The present invention relates to a kind of based on wireless mesh network, more particularly, the present invention relates to integration channel-changing seamlessly, to improve the radio efficiency of mesh network.
Background technology
Typical wireless system capital construction is to comprise one group of access point (APs), also is referred to as base station (BSs), and its each is can be referred to as rearmounted network connections person by one to be connected to a cable network.But, among some communication definitions, one AP that had both deposited is connected directly to required expensive of this cable network but makes this AP is connected to this cable network indirectly by its contiguous APs replacement mode become more attractive, this is to be referred to as a mesh architecture, use the advantage of a netted capital construction then to be, use easily and dispose rapidly, this is because a wireless network is not need each AP the being provided relation of disposing under the situation of rearmounted network connections and interconnecting modules.
Among a mesh network, two adjacent grid points (MPs) are in order to send package forward singly, must use a common channel, therefore, may all can there be sizable variation in the different level of interference that MPs discovered systems geographically and on the time, this then means, in the time of might working as a MP and perceive a channel and have small interference, another MP experiences the interference of high level between but can be at the same time on identical channel, perhaps, similarly, one MP might be on a set channel put sometime the time experience very small interference, but this identical MP might be on this identical channel experiences the interference of height during subsequently another time point, and this promptly means, MPs has faced afoul demand and preference aspect that channel will using.This can sum up as follows:
1) MPs has the strong motivation of using same channel with other MPs in order to strengthen their connectivities for this mesh network, moreover this mesh network wants to communicate each other also have strong motivation to those MPs.
2) when any time point, the different MPs in a mesh network are the different level of interference that can be found to each channel, also therefore can have the relevant different indivedual preferences that will use that channel.
3) interference that each MP discovered is to change along with the time, and this promptly represents, what found in a flash at certain might be inadequate in later time for this mesh network for an optimal channel.
Except these were directly related to the consideration of the throughput of being noticed of this mesh network and service quality (QoS) preference, it then was in order to meet the channel-changing that the adjustment demand is produced that another important operation is considered.
Now, the operation of wireless radio communication is to adjust by FCC (and the similar person in other country), in particular, in case detect an active radar when the enterprising line operate of a channel, in order to vacate some frequency channels and to forbid their further uses in the predefined time, channel-changing can be stipulated.
Be very similar to owing to the channel-changing that disturbs and the preference consideration is excited, this is because the channel-changing that the adjustment demand is excited is need carry out addressing in a based on wireless mesh network.
In order to allow a mesh network can overcome above-mentioned conflicting requirements, network must have the ability of frequency agility, this promptly represents, they should want to change channel, and so channel-changing then is utilize to allow those channel-changings be the QoS of seamless and the terminal user integration mode that can obtain to keep and being carried out.
Now, because it is any in order to the frequency of guaranteeing seamless and integration and the device of channel-changing that traditional WLAN (WLANs) does not provide, therefore, in order to satisfy the adjustment demand of operating in the 5GHz in Europe frequency band, WLAN medium access control (MAC) and physical layer (PHY) specification have been made one and have been revised (IEEE 802.11h).
Yet; IEEE 802.11h dynamic frequency selects (DFS) only can allow wlan system to coexist with radar system among the 5GHz frequency band; channel-changing can be utilized to those terminal users is seamless but it can't provide; and guarantee the mode of effective utilization of radio resource and the method carried out; and; close a disintegration and the reconstruction that channel-changing that one in (IBSS) excited by IEEE 802.11h DFS can cause this IBSS usually at an independent basic service set; one IBSS be one do not need the WLAN that an AP can operate (that is; utilize this WLAN a bit to dot pattern; just in time in contrast to using an AP to come minute BSSs of journey business transferring); but; be most importantly, this IEEE 802.11h revise can't the addressing network those specific demands and restriction.
In sum, frequency agility when keeping connectivity and QoS is the instrument that radio efficiency very needed that improves mesh network, but not being the technology of both having deposited, the method for reaching this feature can not provide, therefore, it need design a kind of prompt method that becomes of channel that is used for, so that mesh network can meet some the adjustment demand under IEEE 802.11h DFS notion, be similar to the WLANs (situation of BSS) and the Ad Hoc pattern (situation of IBSS) of operation in original base is built now.
Summary of the invention
The present invention system is relevant to the wireless zone mesh network of carrying out various method and signal transmitter system in MPs, and to arrive terminal user be seamless method and being carried out so that channel-changing can utilize.
Among an embodiment, a kind of mesh network comprises at least one channel master control person (CM) and a plurality of grid point, wherein, this CM can send a channel-changing purpose message to those MPs at least one of them, to indicate the purpose of this CM from this first channel-changing to a second channel, and after the reception of this channel-changing purpose message, whether this at least one MP can decision will switch to this second channel from this first channel, at this moment, this at least one MP can send a channel-changing response message to this CM, then, this CM will with this channel-changing response message as the basis and the decision whether will be from this first channel-changing to this second channel.This channel-changing purpose message then is to comprise that a pattern changes, and a bandwidth changes, or a channel quantity changes, and this channel-changing purpose message also can be indicated the sequential of this channel-changing.
Description of drawings
Relevant more detailed explanation of the present invention can by next as an example usefulness and be associated with accompanying drawing and the narration of the preferred embodiment understood and being obtained, wherein:
Figure 1A: it is to illustrate according to the signal transmission flow figure by the performed method step of a CM and two MPs of the present invention;
Figure 1B: it is to illustrate according to of the present invention to require its CM to change a signal transmission flow figure of the method step of channel by a MP who is disturbed;
Fig. 1 C: it is to illustrate according to of the present invention to indicate other MPs by any MP it will change a signal transmission flow figure of the method step of channel; And
Fig. 2: it shows a calcspar that comprises the based on wireless mesh network of a CM and at least one MP according to of the present invention.
Embodiment
Afterwards, proper noun " access point (after this, also being referred to as AP) " promptly includes, but not limited to a Node B, a positioner, or any other kenel device that can be situated between in a wireless environment and connect.
Feature of the present invention can be incorporated among the integrated circuit (IC) or being established in one comprises among the circuit of many interconnecting components.
The present invention is by providing different friendships to hold negotiation procedure and signal transmitter system and solve the above problems, this then will provide network to use to carry out the channel device for switching under the situation of the mode of utilizing an integration, the present invention is that the relation between the meeting addressing MPs is a kind of relations on an equal basis (being referred to as one " distributed " communication definitions afterwards), and the relation between the MPs is two kinds of communication definitions of a kind of master slave relation (being referred to as " principal and subordinate " communication definitions afterwards), and among the latter's communication definitions, this master control person who is responsible for arranging channel to be used will be referred to as channel master control person.
These IEEE 802.11 standards can't provide any device, are that this seamless channel-changing mode changes channel to allow those different nodes in the network scope can utilize the mode of an integration and utilize the arrival terminal user by this.
One revises (IEEE 802.11h) is become WLAN MAC and PHY specification for the adjustment demand of the operation in the 5GHz frequency band of being satisfied with Europe, the expression of this correction system allows the wlan system in this 5GHz frequency band to coexist with radar system, but it can't provide and channel-changing can be used utilize to arrive terminal user be seamless and guarantee the mode of effective use of radio resource and the method carried out.Moreover, this revise also can't the definiteness network those specific demands.
The invention reside in and solve all above-mentioned defined those restrictions, therefore, allow service disruption is not taking place, also do not taking place under the situation that the drama of this wireless medium efficient reduces, the seamless channel change among netted.
The present invention includes:
1) signal sends, by this, MPs meeting exchange frequency/channel (that is, channel number or identification symbol), ability and pattern (for example, IEEE-802.11a, b, g, n, j or fellow), and bandwidth of operation (IEEE-802.11n10/20 or 40MHz, 11j10 or 20MHz), ability.
2) a kind of method that allows this CM use an initial channel-changing program.
3) a kind of MP who is disturbed that allows can use the method that its CM of request changes channel.
4) a kind of mechanism that allows any MP use and to communicate with other MPs in this is netted, it then is to change channel.
5) a kind of MP who had both deposited that allows uses the method that is selected as CM.
6) a kind of being used in the method and the program of this mesh network switching channels to meet the adjustment demand.
The signal that I.MPs uses exchange frequency/channelling mode and bandwidth of operation ability sends
If, therefore, just demonstrate its sovereign importance among the channel integration that is distributed in a network of frequencies/channels and mode capabilities when they want to communicate together because contiguous MPs is the demand that must share a common signal channel.Among distributed communication definition, this is to translate together when MPs exchanges this information, and as among master-slave communication definition, it then can be and those subordinates MPs is sent to this information their CM.Next promptly relevant signal is sent and carry out more detailed narration.
One CM or any MP can require their ability information of MP report.This message then is to utilize single-point broadcasting, one multicast, or one broadcasting and send, in addition, alternatively, one MP (for example also can utilize a unsolicited mode, as connecting, for example, authentication, needed other signal sends a part that changes) or utilize a request mode (for example, when being subjected to requiring clearly) and its ability information is reported to this CM or other MPs.
These capability information message are drawn together, but are not limited to:
1) channel number that can operate of this MP or channel identifying symbol.
2) pattern (for example, IEEE 802.11a, b, g, n, j, or fellow) that can support of this MP.
3) bandwidth of operation that can support of this MP (for example, IEEE 802.11n-10,20, or 40MHz, IEEE 802.11j-10, or 20MHz).
4) this MP can be in the time of enterprising line operate the quantity (for example, 1 single channel, perhaps, 2 or more a plurality of while channel 10,20, or 40MHz is wide, person like that) of channel.
5) quantity of the frequency band that can in this scope, operate simultaneously of this MP (2.4GHz only, 5GHz only, 2.4 with 5GHz simultaneously, person like that).
6) frequency agility parameter, for example, the channel dwell time, is used to measure framework and duration between the regulation quiet period of purpose, person like that at minimum channel switching time.
7) above-mentioned any combination (for example, with the function that the channel of each frequency band is set as bandwidth of operation, person like that).
One CM or a MPs system can utilize broadcasting or the frame of similar beacon or controlled frame, for example, and netted BEACON frame, netted PROBE REQUEST frame, or fellow
II. this CM uses the method for an initial channel-changing program
The 1st figure be one in a wireless communication system 100 flow chart of performed method, wherein, 100 of this wireless communication systems are to include a CM 105, and a plurality of MPs 1101-110N.This CM 105 can send to the channel-changing purpose message 115 of those MPs 1101-110N one in order to the purpose of indicating this CM, change to channel Y with self-channel X, at this, X and Y represent channel indicator, and except this relevant change of channel, this message 115 also can comprise the change of a relevant pattern, the change of relevant bandwidth, or the change of relevant channel quantity, and this message 115 also can comprise the information of the sequential that is relevant to this change.
This message 115 can be utilized a broadcast frame or a single-point broadcast frame and send wherein, utilize the advantage of a broadcast frame to be, its can this wireless medium of restricted passage (WM) and the quantity of the message that sends, and the same time, utilize the advantage of a single-point broadcast frame (each relevant MP 110 just has) then to be, it tends to increase the solidity that this signal sends, because this CM 105 can expection confirm (ACK) from one of this MP 110 in order to the MAC that indicates this MP 110 whether correctly to receive this message.As for there not being ACK can be received under the situation of some MP 110,105 of this CM can again send this channel-changing purpose message.
After receiving this channel-changing purpose message, each of those MPs 110 can determine all whether it will switch to its channel new channel, radio frequency (RF) environment of being discovered with its ability, according to its position, and the availability of other CMs/ route in this mesh network is as basis (step 1201-120N).
In case after the decision, each of those MPs 1101-110N all can send a channel-changing response message 125, and it then is the indication that can comprise whether a relevant received notice of this message (can be applicable to this channel-changing purpose message is utilized a broadcasting and among the example that sends) or relevant this MP will follow this CM on its new channel.This information system can comprise various predefined response, includes, but are not limited to:
1) this MP will follow this CM on this new channel.
2) this MP wants to continue to be subjected to the service of this CM on same channel.This kind situation can be, for example, if this MP scans when pointing out that this new channel will reduce its performance, when if it lack to change the ability of channel, if or its decision changes channel and will make it can't satisfy the QoS demand of its business of serving and its not have outside from burst when substituting route.
3) this MP will can not follow this CM on this new channel, but can not require this CM to stay on the identical channel.This kind situation can be, for example, if this MP identification another its feel to provide than the current C M on this new channel better during the candidate CM of performance.
Then, respond notification message 125 as the basis with this channel-changing that is received from its MPs 110, this CM 105 can determine whether it will change channel (step 130), this step 130 makes this CM 105 can rethink that it changes the purpose of channel, for example, only serve a single MP 110 and this MP 110 at this CM 105 and point out that it can't follow to this under situation on new channel, this CM 105 just might determine not carry out channel-changing.And this also to be this CM 105 require a chance measuring from those MPs 110, if it believes that measurement report will make better decision when helpful to it.
When if these CM 105 decisions will be carried out this channel-changing, then it will then can send a channel-changing acknowledge message 135 to each of those MPs 1101-110N, wherein, this message 135 also can comprise the information of the sequential that is relevant to this channel-changing, and this message 135 can be utilized a broadcast frame or a single-point broadcast frame and sends.When if these CM 105 decisions will be carried out this channel-changing, it is to use the information that is comprised among its this channel-changing that derives from this MP 110 response, and it is allocated between the MPs110, therefore, they just can adjust its routing table, this then can be when this CM 105 and MPs 110 can't successfully transmit the package of not following to this new channel to MP 110, and quite a large amount of frequency ranges avoids waste.
One also operable replenish step is, allow those MPs 110 after it changes channel, send to this CM 105 1 and carried out channel-changing message 140, this information can be used to can't successfully transmit the package during to MPs that does not change to this new channel at this CM 105, and quite a large amount of frequency ranges avoids waste.
III. method that a MP who is disturbed can be used require its CM to change channel
This method system comprises that one hands over and holds negotiation procedure, and this then is to allow a MP can require to be used for this this netted CM (or, time set that under the control of this CM this is netted) carry out the channel switching.May increase to some extent when the QoS of this interference that this MP discovered or its business of being served of channel activity entail dangers to for the demand system that so requires.
As shown in Figure 1B, a MP who is disturbed 110 can change channel with one and require message 150 to be sent to its CM 105.This change channel requires message 150 to be sent as a single-point broadcast frame, and it be the destination is the frame of a simple target node, does not arrive the transmission of this destination node and sends forward but can not stop a plurality of nodes to relate to this package.This change channel requires message 150 can comprise the some of them of following message or all:
1) is used to carry out the time restriction of this channel-changing;
2) a preferable mobile channel tabulation;
3) measure for the interference or the noise level of current and candidate channel;
4) be close to MPs 110 tabulations; And
5) route metric.
After receiving this message, then, this CM 105 just can take the different practices:
I) this CM 105 can originate in this friendship of being stated clearly among the chapters and sections II and holds negotiation procedure, and this kind is the situation that is suitable for a plurality of MPs 110 of these CM 105 controls as rule.
Ii) as shown in Figure 1B, this CM 105 can not need it will be carried out just to send a channel-changing acknowledge message 155 under the situation that purpose so is transported to those MPs 110.
Iii) this CM 105 can determine to ignore the message from this MP110 that is disturbed.
Any point in above-mentioned incident flow process, this CM 105 can be carried out the measurement of and advise channel current for this and/or require the measurement that requires the MP 110 of this channel-changing or come from any MP 110 under these CM 105 controls from this.
IV. one kind allows any MP use the method mechanism that communicates and will change channel with this other MPs in netted
Under pure distributed situation, as (that is MPs 110 is a peer, and a CM does not exist in itself) shown in Fig. 1 C, which channel decision will use is the responsibility of each indivedual MP110.Those need the MPs 110 of switching channels still to have strong motivation will to communicate with those other MPs 110, and this then is to have strengthened contiguous MPs 110 to follow the possibility that this must change the MP of channel.
As shown in Fig. 1 C, this method is to comprise a signalling procedure, it can allow a MP 1101 notify relevant this MP that is disturbed 1101 of this one or more netted MPs 1102-110N will carry out the message that channel switches, for demand of method so then is to need as during the demand of adjustment defined ground change channel increase to some extent during to the QoS of its business of serving or at it at this this interferences that MP1101 discovered of being disturbed or channel activity entail dangers to.
As shown in Fig. 1 C, this MP that is disturbed 1101 can send one, or a plurality of channel-changing notification message 1601-160N, to cause this MP that is disturbed 1101 to notify relevant this MP that is disturbed 1101 of this one or more netted MPs 1102-110N will self-channel Y to switch to the message of channel Z, and except the change of channel, those channel-changing notification messages 1601-160N can comprise a pattern to change, bandwidth changes, or the change of channel quantity, and, this message can also comprise the information of the sequential that is relevant to this change, and this message can be utilized single-point broadcasting, multicast, or broadcasting and send, wherein, utilize the advantage of a broadcast frame to be, its can this wireless medium of restricted passage and the quantity of the message that sends, and the same time, utilize the advantage of a single-point broadcast frame (each relevant MP 110 just has) then to be, it is to tend to increase the solidity that this signal sends because the sender of this frame be can expection one confirm in order to the MAC that indicates this target MP whether correctly to receive this message.As under the received situation of ACK meeting that does not have from a certain target MP, this is disturbed 1101 of MP can send this channel-changing purpose message once more.
This channel-changing notification message 160 can comprise the some of them of following message or all:
1) is used to carry out the time restriction of this channel-changing;
2) a preferable mobile channel tabulation;
3) measure for the interference or the noise level of current and candidate channel; And
4) route metric.
After receiving this channel-changing notification message 160, then, any contiguous MP 110 can take the different practices, for example, one of them that receives this channel-changing notification message 160 among those MPs 1102-110N can determine to follow this MP that is disturbed 1101, and under this situation, then its will also can send a channel-changing notification message 160 to its neighbours or, it can determine to ignore the channel-changing notification message 160 that this is received from this MP that is disturbed 1101.
V. one kind allows one both to deposit the selected method as CM of MP
Operation hypothesis MPs with a CM can hold consultation and get the permission with a CM earlier, and this is referred to as CM (again) option program.Existence is as follows with different possibilities and the program that determines a CM:
1) first MP in this is netted automatically becomes a CM.
2) MP who is in open mode be can the decision its neighbours one of them whether be a CM, wherein, this CM system can be by as those scheme programs (for example, authentication, netted BEACON frame receive, capabilities exchange, or fellow) part layer 2 (L2) or layer 3 (L3) broadcasting, multicast or this MP received, and exclusive signal sends and is defined.
3) this CM can preestablish, that is, be fixed as operating period of this mesh network, or free restriction (that is, after the time of a certain amount of being predetermined or be subject to the generation of some situation, this CM option program be can carry out again initial.)
4) one realize than the tool advantage among, this CM can be coincident with this mesh portal, therefore be automatically to point to this CM, an inlet is referred to as the interconnection point between a mesh network and a non-mesh network (for example, being connected to the Ethernet of internet by a router).
5) have at most and those MPs of neighbours' binding become this CM.
6) those MPs determine this CM by random number acquisition, and those MPs can exchange the number that this produces at random each other, will become this MP to determine which MP.
7) those MPs determine this CM, with as from this mesh portal or from an a certain function of having agreed the number of hops of MP.
8) above-mentioned any combination.
According to above-mentioned those methods, need this signal transmission of this CM of identification to comprise the following steps:
1) one of a broadcasting/multicast/single-point broadcast singal transmit frame to require information element (IE) part be to send by this mesh network, with the demand of indicating the relevant CM of contiguous MPs to select, comprise the address of this original MP and other parameter, for example, suspend numerical value, selection criterion, the default identification symbol of the CM that is advised, return address, and such as class person.
2) one of a broadcasting/multicast/single-point broadcast singal transmit frame responding the IE part, comprise this selection criterion response, is to send by this mesh network.
3) comparison program in those MPs be can from those selection criterions response of different neighbours MPs with the situation of decision of assessing and having made with regard to (the highest random number or the fellow that for example, are captured) aspect the selected selection criterion which MP and meet those demands under and carried out.
This CM can use those programs of being narrated in chapters and sections IV to carry out and integration is switched in this netted internodal channel.
VI. it is netted in order to meet the switching channels method and the mechanism of adjustment demand to be used for this
This program comprises the following steps:
1) when being in a part of opening, conduct (again) is correlated or (again) authenticates, periodically request or unsolicited, under the situation, described in MPs exchanging capability information such as the chapters and sections I.
2) (for example, CM identification symbol suspends numerical value to the relevant parameter of netted DFS, static timer is measured at interval and between quiet period, and the like the person) be on netted BEACON or PROBE REPONSE frame, to send, or sent by the single-point broadcast frame, to all MPs.
3) all of MPs or once set be carry out to measure, and these measurement reports can be returned this CM, alternatively or together, each MP can assess these measurements with respect to the generation of radar or other trigger condition.
4) when radar or any other trigger condition are detected, MPs will be by broadcasting/multicast or single-point broadcast frame and is reported these trigger conditions to this CM, alternatively or together, announce radar or the trigger condition that this is detected to contiguous MPs, and the time of waiting the amount of being predetermined for the answer from the initial frequency shift of this CM.
5) this CM (or this MP itself) can switch declaration (MCSA) with a netted channel, IE part as any other netted broadcasting/multicast or single-point broadcast, or as an independent netted broadcasting/multicast or a single-point broadcast singal transmit frame, what be sent to its MPs that is responsible for owns, or once set, wherein, this MCSA has comprised all necessary parameters, for example, recommend, preferable, or the switching time of regulation, new channel, pattern and bandwidth settings, this MCSA signal sends can only influence a special netted binding, the netted binding of a group, or also can change the setting of all MPs.This CM can consider the ability of those MPs that 115 signals of message of Fig. 1 send, and this signal sends between the quiet period that system can also comprise regulation and other influences the operating and setting of frequency.
6) those MPs that received this MCSA will be according to a channel-changing acknowledge message 135, as shown in fig. 1, this information that is received and change their frequency setting, they then be can to or do not confirm the successful reception or the execution of those changes in this channel-changing acknowledge message 135 at Fig. 1 to this CM.
VII. carry out and framework
Those signals send message and position between MPs or the information exchange between MPs and this CM, as the narrator of institute among the chapters and sections I-VI, execution can be by L2 (for example, the MAC layer), signal transmit frame or IEs (preferred embodiment), L3 or above-mentioned signal transmission package or IEs are (for example, parcel becomes Internet Protocol (IP) package, transmission control protocol (TCP)/IP package or fellow), or its in conjunction with and reached.
Similarly, those programs of being narrated in chapters and sections I-VI can also be implemented as the L2 hardware/software in a MAC or the part of a physical sublayer management (SME) (preferred embodiment), above-mentioned layer 2 software, for example, those operations in MPs and keep (O﹠amp; M) part of routine, or its combination.
All method systems of being narrated in chapters and sections I-VI can be subjected to the restriction of the framework setting in those indivedual MPs or can obtain to supply by it, and, system can provide statistics and feed back to netted inside or the external network monitoring, and can use the controlled entity to the operating characteristics control of MP.
These frameworks are set and reportable department of statistic can be by following and be set in or report from individual other MPs or MPs group:
1) in PHY, MAC, or the database among the SME are to be realized with the form of management information bank (MIBs) than tool advantage ground;
2) L2MAC or SME arrive the signal transmission message between the protocol entity of top, are to be realized (but being not limited thereto) with the form of APIs than tool advantage ground; Or
3) SME in a MP implements, MAC, the pixel or its combination that are exchanged between PHY and other protocol entity.
The employed framework of management entity is set and can be comprised an admissible frequency channels outside this MP (or MPs group) goes up, and/or range of channels, admissible mode initialization (for example, IEEE 802.11a, b, g, j, n, or fellow), (for example can adopt any band setting, 10/20/40 MHz, or fellow), admissible maximum channel quantity (for example, single channel, two channels, or fellow), the unlatching of frequency agility or close, the address of CM and identification accord with, and are used for the timer numerical value (for example, channel quiet and measurement are at interval) of frequency agility, the frequency switching command that is used for this MP, or above-mentioned any combination.
In this MP that can be used by the external management entity, reportable statistics can be, current channel, pattern, bandwidth, the quantity of channel in the time of MPs and contiguous MPs (as known to) (or its in conjunction with), channel statistical, for example, performed numerical value and kenel are measured, and the like the person, or its any combination.
Fig. 2 is the calcspar according to a based on wireless mesh network 200 of the present invention, wherein, this based on wireless mesh network 200 is to comprise a CM 205 and a MP 210, at this, though illustrative purposes for example, only show a MP, but the people who has the knack of this skill should be appreciated that, this mesh network 200 be can comprise have with Fig. 2 in a plurality of MPs of illustrational these MP 210 similar frameworks.
As shown in Fig. 2, this CM 205 comprises a transmitter 215, one receiver 220, an and processor 225, and this MP210 comprises transmitter 230 one by one, one receiver 235, an and processor 240, wherein, this processor 225 of this CM 205 can produce a channel-changing purpose message, and it is to transfer at least one MP 210 by this transmitter 215, this channel-changing purpose message then is to indicate the purpose of this CM 210 from one first channel-changing to a second channel, then, in this channel-changing purpose message after this receiver 235 at least one grid point 210 has been received by this, this processor 240 in this at least one MP 210 will determine whether this MP 210 should switch to this second channel from this first channel, if words, this transmitter 230 of this at least one MP 210 will send a channel-changing response message that this processor 240 produced to this CM 205, and, after this channel-changing response message was received by this receiver 220 among this CM 205, whether this processor 225 in this CM 205 will determine as the basis with this channel-changing response message will be from this first channel-changing to this second channel.
This channel-changing purpose message pattern of can indicating changes, and a bandwidth changes, and a channel quantity changes, or the sequential of channel-changing, and a broadcast frame or single-point broadcast frame can be in order to send this channel-changing purpose message.Moreover this channel-changing response message can comprise a notice, and confirming the reception of this channel-changing purpose message, and whether this channel-changing response message can indicate this MP 210 can be from this first channel-changing to this second channel.In addition, this processor 240 in this MP 210 is can be with the availability of this RF environment of this MP 210 other CMs as the basis or in this mesh network as the basis, and whether decision will switch to this second channel from this first channel.
Embodiment
1. one kind in a method that comprises in the mesh network of at least one channel master control person (CM) and a plurality of grid point (MP), and it comprises the following steps:
(a) this CM send a channel-changing purpose message to those MPs at least one of them, and this message is indicated the purpose of this CM from one first channel-changing to a second channel;
(b) when receiving this channel-changing purpose message, whether this at least one MP decision will be from this first channel-changing to this second channel;
(c) this at least one MP sends a channel-changing response message to this CM; And
(d) this CM with this channel-changing response message as the basis and the decision whether will be from this first channel-changing to this second channel.
2. according to embodiment 1 described method, wherein, this channel-changing purpose message is indicated the change of a pattern.
3. according to embodiment 1 described method, wherein, this channel-changing purpose message is indicated the change of a bandwidth.
4. according to embodiment 1 described method, wherein, this channel-changing purpose message is indicated the change of a channel quantity.
5. according to embodiment 1 described method, wherein, this channel-changing purpose message is indicated the sequential of this channel-changing.
6. according to embodiment 1 described method, wherein, a broadcast frame is in order to send this channel-changing purpose message.
7. according to embodiment 1 described method, wherein, a single-point broadcast frame is in order to send this channel-changing purpose message.
8. according to embodiment 1 described method, wherein, this channel-changing response message comprises a notice, and it confirms the reception of this channel-changing purpose message.
9. according to embodiment 1 described method, wherein, whether this channel-changing response message indicates this MP will be from this first channel-changing to this second channel.
10. according to embodiment 1 described method, wherein, this at least one MP decision whether will with radio frequency (RF) environment of this MP as the basis and certainly this first channel switch to this second channel.
11. according to embodiment 1 described method, wherein, this at least one MP decision whether will with the availability of other CMs in this mesh network as the basis and certainly this first channel switch to this second channel.
12. a mesh network comprises:
(a) at least one channel master control person;
(b) a plurality of grid points, wherein:
(i) this CM send a channel-changing purpose message to those MPs at least one of them, and this message is indicated the purpose of this CM from one first channel-changing to a second channel;
(ii) when receiving this channel-changing purpose message, whether this at least one MP decision will switch to this second channel from this first channel;
(iii) this at least one MP sends a channel-changing response message to this CM; And
(iv) this CM with this channel-changing response message as the basis and the decision whether will be from this first channel-changing to this second channel.
13. according to embodiment 12 described mesh networks, wherein, this channel-changing purpose message is indicated the change of a pattern.
14. according to embodiment 12 described mesh networks, wherein, this channel-changing purpose message is indicated the change of a bandwidth.
15. according to embodiment 12 described mesh networks, wherein, this channel-changing purpose message is indicated the change of a channel quantity.
16. according to embodiment 12 described mesh networks, wherein, this channel-changing purpose message is indicated the sequential of this channel-changing.
17. according to embodiment 12 described mesh networks, wherein, a broadcast frame is in order to send this channel-changing purpose message.
18. according to embodiment 12 described mesh networks, wherein, a single-point broadcast frame is in order to send this channel-changing purpose message.
19. according to embodiment 12 described mesh networks, wherein, this channel-changing response message comprises a notice, it confirms the reception of this channel-changing purpose message.
20. according to embodiment 12 described mesh networks, wherein, whether this channel-changing response message indicates this MP will be from this first channel-changing to this second channel.
21. according to embodiment 12 described mesh networks, wherein, this at least one MP decision whether will with the radio frequency environment of this MP as the basis and certainly this first channel switch to this second channel.
22. according to embodiment 12 described mesh networks, wherein, this at least one MP decision whether will with the availability of other CMs in this mesh network as the basis and certainly this first channel switch to this second channel.
Though feature of the present invention and assembly are to narrate with the preferred embodiment of special combination, but each feature or assembly can use under the situation of further feature that does not need this preferred embodiment and assembly individually, or in conjunction with or do not use under the situation in conjunction with further feature of the present invention and assembly.
Claims (22)
1. one kind in a method that comprises in the mesh network of at least one channel master control person (CM) and a plurality of grid point (MP), and it comprises the following steps:
(a) this CM send a channel-changing purpose message to those MPs at least one of them, and this message is indicated the purpose of this CM from one first channel-changing to a second channel;
(b) when receiving this channel-changing purpose message, whether this at least one MP decision will be from this first channel-changing to this second channel;
(c) this at least one MP sends a channel-changing response message to this CM; And
(d) this CM with this channel-changing response message as the basis and the decision whether will be from this first channel-changing to this second channel.
2. method according to claim 1 is characterized in that, this channel-changing purpose message is indicated the change of a pattern.
3. method according to claim 1 is characterized in that, this channel-changing purpose message is indicated the change of a bandwidth.
4. method according to claim 1 is characterized in that, this channel-changing purpose message is indicated the change of a channel quantity.
5. method according to claim 1 is characterized in that, this channel-changing purpose message is indicated the sequential of this channel-changing.
6. method according to claim 1 is characterized in that, a broadcast frame is in order to send this channel-changing purpose message.
7. method according to claim 1 is characterized in that, a single-point broadcast frame is in order to send this channel-changing purpose message.
8. method according to claim 1 is characterized in that, this channel-changing response message comprises a notice, and it confirms the reception of this channel-changing purpose message.
9. method according to claim 1 is characterized in that, whether this channel-changing response message indicates this MP will be from this first channel-changing to this second channel.
10. method according to claim 1 is characterized in that, this at least one MP decision whether will with the radio frequency environment of this MP as the basis and certainly this first channel switch to this second channel.
11. method according to claim 1 is characterized in that, this at least one MP decision whether will with the availability of other CMs in this mesh network as the basis and certainly this first channel switch to this second channel.
12. a mesh network comprises:
(a) at least one channel master control person;
(b) a plurality of grid points, wherein:
(i) this CM send a channel-changing purpose message to those MPs at least one of them, and this message is indicated the purpose of this CM from one first channel-changing to a second channel;
(ii) when receiving this channel-changing purpose message, whether this at least one MP decision will switch to this second channel from this first channel;
(iii) this at least one MP sends a channel-changing response message to this CM; And
(iv) this CM with this channel-changing response message as the basis and the decision whether will be from this first channel-changing to this second channel.
13. mesh network according to claim 12 is characterized in that, this channel-changing purpose message is indicated the change of a pattern.
14. mesh network according to claim 12 is characterized in that, this channel-changing purpose message is indicated the change of a bandwidth.
15. mesh network according to claim 12 is characterized in that, this channel-changing purpose message is indicated the change of a channel quantity.
16. mesh network according to claim 12 is characterized in that, this channel-changing purpose message is indicated the sequential of this channel-changing.
17. mesh network according to claim 12 is characterized in that, a broadcast frame is in order to send this channel-changing purpose message.
18. mesh network according to claim 12 is characterized in that, a single-point broadcast frame is in order to send this channel-changing purpose message.
19. mesh network according to claim 12 is characterized in that, this channel-changing response message comprises a notice, and it confirms the reception of this channel-changing purpose message.
20. mesh network according to claim 12 is characterized in that, whether this channel-changing response message indicates this MP will be from this first channel-changing to this second channel.
21. mesh network according to claim 12 is characterized in that, this at least one MP decision whether will with the radio frequency environment of this MP as the basis and certainly this first channel switch to this second channel.
22. mesh network according to claim 12 is characterized in that, this at least one MP decision whether will with the availability of other CMs in this mesh network as the basis and certainly this first channel switch to this second channel.
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| US66955005P | 2005-04-08 | 2005-04-08 | |
| US60/669,550 | 2005-04-08 | ||
| US11/398,143 | 2006-04-04 |
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| CN101502156A true CN101502156A (en) | 2009-08-05 |
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| CNA2006800112829A Pending CN101502156A (en) | 2005-04-08 | 2006-04-05 | Method and apparatus for coordinating seamless channel switching in a mesh network |
| CNU2006201000353U Expired - Fee Related CN200947612Y (en) | 2005-04-08 | 2006-04-10 | Mesh network for coordinating seamless channel switching |
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| CNU2006201000353U Expired - Fee Related CN200947612Y (en) | 2005-04-08 | 2006-04-10 | Mesh network for coordinating seamless channel switching |
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| KR (1) | KR20060107415A (en) |
| CN (2) | CN101502156A (en) |
| AR (1) | AR053709A1 (en) |
| DE (1) | DE202006005732U1 (en) |
| TW (2) | TWM300925U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102098752A (en) * | 2011-02-25 | 2011-06-15 | 中国人民解放军国防科学技术大学 | Wireless mesh network (WMN)-based association and seamless handover method |
| CN103517321A (en) * | 2012-06-26 | 2014-01-15 | 上海无线通信研究中心 | Heterogeneous network fusion-based interference collection and suppression method |
| CN107431921A (en) * | 2015-03-17 | 2017-12-01 | 索尼公司 | Message processing device, information processing method and program |
| CN110089142A (en) * | 2016-11-08 | 2019-08-02 | 株式会社东芝 | Control device, wireless communication device and channel control method |
| CN110089160A (en) * | 2016-12-21 | 2019-08-02 | 泰斯康有限公司 | Frequency hopping spread spectrum communication in mesh network |
| WO2023061093A1 (en) * | 2021-10-14 | 2023-04-20 | 荣耀终端有限公司 | Wifi p2p connection method, electronic device, program product and medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US7953055B2 (en) | 2006-07-14 | 2011-05-31 | Samsung Electronics Co., Ltd. | Multi-channel MAC apparatus and method for WLAN devices with single radio interface |
| KR100905612B1 (en) * | 2006-07-14 | 2009-07-02 | 삼성전자주식회사 | Apparatus and method of multi-channel media access control for wireless local area network devices with single radio interface |
| KR100875738B1 (en) | 2007-02-05 | 2008-12-26 | 삼성전자주식회사 | Access point performing channel change while maintaining WSD link and control method of channel change |
| US7688861B2 (en) * | 2007-04-27 | 2010-03-30 | Hewlett-Packard Development Company, L.P. | Media channel switching |
| TWI475850B (en) * | 2008-01-25 | 2015-03-01 | Microelectronics Tech Inc | Methdo for bridge connection |
| EP2104291A1 (en) * | 2008-03-18 | 2009-09-23 | Koninklijke Philips Electronics N.V. | Method for a wireless personal area network |
| US8161515B2 (en) * | 2009-05-13 | 2012-04-17 | Alcatel Lucent | Fast channel change handling of late multicast join |
| US9775046B2 (en) | 2009-06-26 | 2017-09-26 | Qualcomm, Incorporated | Power management |
| US8965293B2 (en) | 2009-06-26 | 2015-02-24 | Qualcomm Incorporated | Interference management |
| KR101931943B1 (en) | 2011-02-27 | 2018-12-24 | 엘지전자 주식회사 | Mesh network configuration in a white space band |
| CN111757364B (en) * | 2019-09-20 | 2023-10-10 | 广州极飞科技股份有限公司 | Network switching method, communication system and related device |
-
2006
- 2006-04-05 CN CNA2006800112829A patent/CN101502156A/en active Pending
- 2006-04-06 TW TW095205788U patent/TWM300925U/en not_active IP Right Cessation
- 2006-04-06 TW TW095112278A patent/TW200704247A/en unknown
- 2006-04-07 DE DE202006005732U patent/DE202006005732U1/en not_active Expired - Lifetime
- 2006-04-07 KR KR1020060032064A patent/KR20060107415A/en not_active Application Discontinuation
- 2006-04-07 AR ARP060101385A patent/AR053709A1/en unknown
- 2006-04-10 CN CNU2006201000353U patent/CN200947612Y/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102098752A (en) * | 2011-02-25 | 2011-06-15 | 中国人民解放军国防科学技术大学 | Wireless mesh network (WMN)-based association and seamless handover method |
| CN102098752B (en) * | 2011-02-25 | 2013-02-06 | 中国人民解放军国防科学技术大学 | Wireless mesh network (WMN)-oriented association and seamless handover method |
| CN103517321A (en) * | 2012-06-26 | 2014-01-15 | 上海无线通信研究中心 | Heterogeneous network fusion-based interference collection and suppression method |
| CN103517321B (en) * | 2012-06-26 | 2018-05-04 | 上海无线通信研究中心 | Interference collection and suppressing method based on heterogeneous network converged |
| CN107431921A (en) * | 2015-03-17 | 2017-12-01 | 索尼公司 | Message processing device, information processing method and program |
| US10979900B2 (en) | 2015-03-17 | 2021-04-13 | Sony Corporation | Information processing device and information processing method |
| CN110089142A (en) * | 2016-11-08 | 2019-08-02 | 株式会社东芝 | Control device, wireless communication device and channel control method |
| CN110089160A (en) * | 2016-12-21 | 2019-08-02 | 泰斯康有限公司 | Frequency hopping spread spectrum communication in mesh network |
| WO2023061093A1 (en) * | 2021-10-14 | 2023-04-20 | 荣耀终端有限公司 | Wifi p2p connection method, electronic device, program product and medium |
Also Published As
| Publication number | Publication date |
|---|---|
| AR053709A1 (en) | 2007-05-16 |
| TWM300925U (en) | 2006-11-11 |
| CN200947612Y (en) | 2007-09-12 |
| TW200704247A (en) | 2007-01-16 |
| KR20060107415A (en) | 2006-10-13 |
| DE202006005732U1 (en) | 2006-08-31 |
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