CN101631358A - Method for transmitting data in wireless local area network and equipment thereof - Google Patents
Method for transmitting data in wireless local area network and equipment thereof Download PDFInfo
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- CN101631358A CN101631358A CN200910089085A CN200910089085A CN101631358A CN 101631358 A CN101631358 A CN 101631358A CN 200910089085 A CN200910089085 A CN 200910089085A CN 200910089085 A CN200910089085 A CN 200910089085A CN 101631358 A CN101631358 A CN 101631358A
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Abstract
The invention provides a method for transmitting a data in a wireless local area network and equipment thereof, wherein the method is applied to the wireless local area network which comprises at least one of access points APs; each AP transmits at least one of beacon frames; the beacon frame which is relative to the data to be transmitted is appointed; and a data information cell for carrying the data to be transmitted is defined in the appointed beacon frame. The method comprises the following step of: if the date to be transmitted is currently needed to be transmitted, and when the preset transmitting period of the beacon frame is reached, the data to be transmitted is carried in the data information cell in the appointed beacon frame to be transmitted. The invention reduces the complexity for transmitting the data in the network.
Description
Technical field
The present invention relates to WLAN (WLAN) technology, the method and apparatus of transfer of data among particularly a kind of WLAN.
Background technology
In WLAN, the Frame that client (station is specially the wireless client that meets 802.11 agreements) receives only access point (AP:AccessPoint) transmission of (perhaps coupled) that be associated with it is set usually.Wherein, AP provides the bridging functionality of wireless client to local area network (LAN), and realize in the WLAN (wireless local area network) wireless to wired, wired to wireless frame conversion.
Referring to Fig. 1, the network architecture diagram of the realization data communication that Fig. 1 provides for prior art.As shown in Figure 1, client 1 and client 2 are unconnected with access point 1, and client 3 is associated with access point 1.So, as if there being a current Frame (this Frame specifically can be Frame or the user configured Frame from other clients transmissions that access point 1 receives) that needs transmission in the access point 1, then when arriving the transmitting time of this Frame, access point 1 sends this Frame by the form of broadcasting or multicast.Because client 1 or client 2 are unconnected with the access point 1 that sends Frame, so, client 1 or client 2 can not receive the Frame that access point 1 sends; Because client 3 is associated with the access point 1 that sends Frame, therefore, client 3 can receive the Frame that access point 1 sends, and so, after client 3 receives Frame, can resolve this Frame, and the Frame of resolving is handled accordingly.
The number of the client that access point is associated in the prior art is limited, and usually, an access point can only insert 64 clients.That is to say when an access point sends Frame, to have only 64 clients can receive the Frame that this access point sends, and the Frame that receives is handled accordingly.Those skilled in the art will be appreciated that, in the network, the quantity of client is hundreds and thousands of, such as there being 1920 clients in the intranet,, can both receive data for guaranteeing clients all in the current intranet if an access point can only insert 64 clients, just 30 access points need be set in this intranet, if current access point is not enough, also need to increase again access point, so that all clients can both receive data in the intranet.As can be seen, the network size that requires of the existing method of utilizing the data frame transfer data is huger.
Summary of the invention
The invention provides the side and the equipment of transfer of data in a kind of WLAN, the defective that is caused when avoiding utilizing the data frame transfer data in the prior art.
The method of transfer of data in a kind of WLAN (wireless local area network), this method are applied to comprise among the WLAN (wireless local area network) WLAN of an above access point AP; Each AP sends an above beacon beacon frame; This method comprises:
A makes the beacon frame that is associated with data to be sent from the beacon frame middle finger that each AP sends;
B, if the current described data to be sent of transmission that need when the default beacon frame transmission cycle arrives, send described Data-carrying to be sent in specifying the beacon frame, described data to be sent comprise data header and data content.
A kind of data transmission set, this equipment are applied to comprise among the WLAN WLAN of an above access point AP; Each AP sends an above beacon beacon frame; This equipment comprises: designating unit and transmitting element;
Described designating unit is used for making the beacon frame that is associated with data to be sent from the beacon frame middle finger that each AP of described WLAN sends;
Described transmitting element is used for when the default beacon frame transmission cycle arrives, if the current described data to be sent of transmission that need send described Data-carrying to be sent in specifying the beacon frame, described data to be sent comprise data header and data content.
A kind of data receiver, this equipment are applied to comprise among the WLAN (wireless local area network) WLAN of an above access point AP; Each AP sends an above beacon beacon frame; This equipment comprises:
Receiving element is used for receiving on the pre-configured channel of self supporting and has carried the appointment beacon frame of data to be sent, and described data to be sent comprise data header and data content;
Processing unit is used for extracting described data header and described data content from the appointment beacon frame that described receiving element receives, and data header and the data content that extracts is provided.
In sum, in the method and apparatus provided by the invention, be not to utilize traditional Frame broadcast data in the prior art, but utilize beacon Beacon frame to carry data.Those skilled in the art will know that, Beacon frame and requiring unlike Frame of the prior art has only the network equipment that is associated with the AP that sends this Beacon frame just can receive this Beacon frame such as client etc., such as, there are 1920 clients in the intranet, because an access point can only insert 64 clients in the prior art, for guaranteeing that clients all in the current intranet can both receive data, just 30 access points need be set in this intranet, and because Beacon frame and unlike Frame of the prior art, need have only the network equipment that is associated with the AP of transmission Beacon frame just can receive the Beacon frame, so, as long as the Beacon frame bearer data that an AP is sent, just can make 1920 clients can both receive this Beacon frame, like this, having avoided the number of the client that is associated owing to access point in the prior art is the limited defective that causes.
Further, owing to utilize among the present invention the Beacon frame bearer data can make the all-network equipment the AP that removes this Beacon frame of transmission in the network can both receive this Beacon frame, that is to say, pass through Beacon transmission frame number certificate in the embodiment of the invention, and unlike utilizing the data frame transfer data need the quantity of data receiving terminal be limited in the prior art, so, just the complexity that the current access point of network also needs to increase again access point inadequately can not occur, and then can significantly reduce network size yet;
The beacon frame that is associated with data to be sent is specified on a nearlyer step ground in the beacon frame that all AP send from current WLAN in the embodiment of the invention, can realize specifying AP to send the function of data.
Description of drawings
The network architecture diagram of the realization data communication that Fig. 1 provides for prior art;
Fig. 2 is the structural representation of beacon frame in the prior art;
The basic flow sheet that Fig. 3 provides for the embodiment of the invention;
The detail flowchart that Fig. 4 provides for the embodiment of the invention;
The data transmission set structure chart that Fig. 5 provides for the embodiment of the invention;
The data receiver structure chart that Fig. 6 provides for the embodiment of the invention.
Embodiment
Usually, after the AP energized, will when arriving, send the beacon frame in beacon frame (beacon frame) the transmission cycle.Wherein, the Beacon frame is a broadcast management frame, is used for bearer management information (such as the pairing network information of AP that sends this Beacon frame), but and is not used in the data that communicate between the bearer network equipment.Referring to Fig. 2, Fig. 2 is the structural representation of beacon frame in the prior art.As shown in Figure 2, this beacon frame comprises at least: medium access control (MAC:Media AccessControl) field and frame body field.Wherein, MAC field comprises some type informations, can comprise fields such as frame control.Frame body field is used for bearer management information, and the maximum length of the management information of its carrying is 2312 bytes, and it comprises service combination identification code fields such as (SSID:Service Set Identifier).Usually, an AP can support an above SSID, owing to comprised ssid field in the beacon frame, different SSID is carried in the different beacon frames, the beacon frame that promptly different SSID is corresponding different.That is to say that an AP can send more than one beacon frame, wherein, each beacon frame comprises the ssid field of having inserted corresponding SSID.
Because the beacon frame is used for bearer management information, its purpose is exactly to need the management information that this beacon frame of device learns carries in the network, and then adjusts the parameter of self according to this management information.In order to guarantee that the equipment in the network can both receive the Beacon frame that this AP sends, 802.11 require to have only the network equipment that is associated with the AP that sends this Beacon frame just can receive the Beacon frame such as client etc. in the agreement and unlike requiring Frame of the prior art, the all-network equipment except that the AP of this transmission Beacon frame can both receive the Beacon frame in the network but make.
Based on this, the embodiment of the invention can make the Beacon frame carry data to be sent by means of the characteristics of Beacon frame, like this, the defective that has caused with regard to having avoided utilizing Frame to send data in the prior art can realize that the all-network equipment except that the AP that sends the Beacon frame can both receive the data of carrying in the Beacon frame in the network.Such as, in an intranet network, if current have 1920 clients need receive data, if transmit operation according to the prior art Frame, then when an AP can only insert 64 wireless clients, enterprise network just needs 30 AP, if and utilize the Beacon frame bearer data, because the all-network equipment in the network except that the AP that sends the Beacon frame can both receive the Beacon frame, so, as long as the Beacon frame bearer data that an AP is sent just can make 1920 clients can both receive this Beacon frame, like this, having avoided the number of the client that is associated owing to access point in the prior art is the limited defective that causes, and has significantly reduced the complexity of data transmission in network, has also correspondingly further simplified network size.
In order to make the purpose, technical solutions and advantages of the present invention clearer, describe the present invention below in conjunction with the drawings and specific embodiments.
Referring to Fig. 3, the basic flow sheet that Fig. 3 provides for the embodiment of the invention.This method is applied to comprise among the WLAN of an above AP, and each AP can send an above beacon frame; As shown in Figure 3, this flow process can may further comprise the steps:
Here, data to be sent can comprise data header and data content, and wherein, data content specifically can be the data message of the needs transmission of users' settings such as company introduction, product introduction, product discounting, weather forecast or hot news.
Here execution in step 301 why mainly is in order to represent that present embodiment is not directly to utilize all the beacon frames among the WLAN to carry data to be sent, but specifies several beacon frames wherein to carry data to be sent according to the actual requirements.Because the main effect of beacon frame is used to announce management information, therefore,, can specify one of them or two beacon frames to carry data to be sent usually for guaranteeing stability of network.Wherein, step 301 can have multiple way of realization when specific implementation, such as because SSID and beacon frame have corresponding relation, so, can specify corresponding beacon frame by the SSID that is provided with data to be sent are associated; Perhaps the more than one beacon frame that directly current AP is sent is appointed as the beacon frame that is associated with data to be sent etc.
The beacon frame difference that each AP sends need to prove, owing to by above-mentioned steps 301, can realize specifying AP to send the operation of data to be sent.
Here, default beacon frame sends the cycle can be identical with the beacon frame transmission cycle of the prior art, also can be different, no longer limit here.As for the concrete operations that in the step 302 Data-carrying to be sent sent in specifying the beacon frame, can be referring to shown in Figure 4.
So, realized that by aforesaid operations the beacon frame that utilizes that the embodiment of the invention provides sends the operation of data.
More than the basic flow sheet that provides for the embodiment of the invention, the further understanding for ease of the embodiment of the invention is described in detail the embodiment of the invention below.
Referring to Fig. 4, the detail flowchart that Fig. 4 provides for the embodiment of the invention.This method is applied to comprise among the WLAN of an above AP; Each AP sends an above beacon frame, the SSID that different beacon frames is corresponding different, this embodiment is to specify the beacon frame that is associated with data to be sent by the SSID that is associated with data to be sent is set, and as shown in Figure 4, this flow process can may further comprise the steps:
Here, step 401 is specially: among all SSID that current all AP support from WLAN the SSID that is associated with data to be sent is set.Such as, there are AP1 and AP2 in the current network, wherein, AP1 supports 16 SSID, is respectively SSID1a to SSID16a, and AP2 supports 32 SSID, be respectively SSID1b to SSID32b, it is related with data to be sent with SSID16b that SSID1a can be set, and promptly specifies SSID1a and SSID16b to divide other corresponding beacon frame to carry data to be sent, and the beacon frame of other SSID correspondences is still carried out according to the operation (i.e. a bearer management information) of prior art.
802.11 self-defined cell in the frame body field of the beacon frame that AP sent that agreement regulation can be in WLAN, and self-defining each cell containing element at least identifies (element ID) field, length (Length) field and organizes unique indications (OUI:Organizationally uniqueidentifier) field.Wherein, the element id field takies 1 byte, and the Length fields account is with 1 byte, and the OUI fields account is with 3 bytes.Therefore, step 402 can be specially according to the stipulative definition cell of data of 802.11 agreements: definition of data cell in the frame body field in specifying the beacon frame.Wherein, the number M of the cell of data of this definition is not limit, but, because data to be sent comprise data header and data content, wherein, data header and data content are in different cell of data, so, just need have at least two cell of data to carry data header and data content that data to be sent comprise, therefore, the number M of the cell of data of definition is minimum to be 2.And because the maximum length of frame body field is 2312 bytes in the 802.11 agreement regulation beacon frames, therefore, the maximum total length of M cell of data of definition also need be less than or equal to 2312 bytes in the step 402.So, can know that in the embodiment of the invention, M is the positive integer more than or equal to 2, and the maximum total length of M cell of data is less than or equal to 2312 bytes.
Usually, data to be sent comprise data header and data content two parts.The embodiment of the invention receives to specify for ease of the recipient and knows that current what carry is data header or data content to this appointment beacon frame, can represent by type field behind the beacon frame.Wherein, the big I of type field takies 1 byte, and its particular location embodiment of the invention in cell of data does not specifically limit.Preferably, but in the embodiment of the invention specified data cell 1 byte after the OUI field be type field.
Here, the value of type field comprises second types value that is used to represent the first kind offset of data header and is used to represent data content in the step 403.Particularly, when the type field value is first kind offset (such as 0x00), the cell of data at expression the type field place is used to carry data header (cell of data that will carry data header is designated as the data header cell), that is to say, need to insert data header in the data field of this data header cell; When the type field value is second types value (such as 0x01), the cell of data at expression the type field place is used to carry data content (cell of data that will carry data content is designated as the data content cell), that is to say, need to insert data content in the data field of this data content cell; Certainly, if the type field value also can comprise other values except that the first kind offset and second types value, when the type field value is worth for other, the cell of data at the type field place can be designated as the reservation cell, be used to carry the information that follow-up needs send in order to this reservation cell.
802.11 agreement also is defined in, and self-defining cell loaded information length is 252 bytes to the maximum in the frame body field of beacon frame, consider the application of the embodiment of the invention, being used in the embodiment of the invention carried the data field of data to be sent in accordance with 802.11 agreements, and promptly the maximum length of the data field in the step 403 is 252 bytes.But, need to prove that present embodiment need take the length of data field when the define styles field.If type field taken a byte, that is to say that present embodiment need be extracted 1 byte and be used for as type field from data field, like this, in the present embodiment in the cell of data maximum length of data field can correspondingly change to 252-1=251 byte.
The length that one skilled in the art will appreciate that data content in the data to be sent can be far longer than 251 bytes usually; So, if the length of data content is greater than 251 bytes in the data to be sent, such as being the 1K byte, then execution in step 404 is to step 411.
Certainly, the present embodiment length that also can be applicable to data content in the data to be sent is less than or equal to the situation of 251 bytes.Because the maximum length of data field is 251 bytes in the cell of data, if the length of data content is less than or equal to 251 bytes in the data to be sent, this just represents that a cell of data just can finish the carrying of the data content in the data to be sent, so, just do not need execution in step 404 to step 411.Like this, when the length of data content in the data to be sent is less than or equal to 251 bytes, after execution of step 403, directly carry out following step: is example with the beacon frame of current employing for the corresponding beacon frame of SSID1a that is associated with data to be sent, then step 404a is, if the current transmission data to be sent that need, when the default beacon frame transmission cycle arrives, making the type field value of first cell of data in the corresponding beacon frame of the SSID1a that is associated with data to be sent is first kind offset, data header is filled in the data field of first cell of data; Step 405a is, the type field value that makes second cell of data except that first cell of data is second types value, and the data content of data to be sent is filled in the data field of this second cell of data; Here, second cell of data specifically can be second cell of data of arranging in order that defines in the beacon of SSID1a correspondence frame; Also can be any one cell of data except that first cell of data that in the beacon of SSID1a correspondence frame, defines; Step 406a is to send the beacon frame through the SSID1a correspondence of step 404a and step 405a processing.The transmit operation that the length of data content is less than or equal to 251 bytes in the data to be sent length of data content in the data to be sent is fairly simple greater than the operation of 251 bytes.
Here, the sequence-number field in the step 404 can take 2 bytes, and its particular location embodiment of the invention in cell of data does not specifically limit.Preferably, but in the embodiment of the invention specified data cell 2 bytes behind the type field be sequence-number field.Need to prove, the sequence-number field of step 404 definition also needs to take the length of data field in the cell of data, so, if type field has taken a byte, sequence-number field has taken two bytes, then when carrying out this step 404, in the present embodiment in the cell of data maximum length of data field change to 252-1-2=249 byte.
In the present embodiment, the meaning that sequence-number field is represented depends on the segmentation of data content in the data to be sent and the type that type field is represented.For ease of explanation, the segmentation of data content in the data to be sent is described earlier.
Here, owing to all needing to take in the cell of data length of data field, type field and data field make in the present embodiment that the maximum length of data field is a 252-1-2=249 byte in the cell of data, so, in the step 404 data content in the data to be sent being carried out segmentation specifically can comprise: for principle the data content in the data to be sent is carried out segmentation according to the maximum length that is less than or equal to data field in the cell of data (249).Particularly, each segment data content that step 404 is divided into all has corresponding sequence number, this sequence number is specially the numbering of current this segment data content in the whole data content that data to be sent comprise, such as, the data content that data to be sent are comprised is divided into 8 sections, be respectively the first segment data content to the, eight segment data contents, wherein, numbering 1 to 8 is designated as the sequence number of the first segment data content to the, eight segment data contents respectively.Here, if total hop count that step 404 is divided into is N.
So, present embodiment can define the meaning that sequence-number field is represented, be specially: can correctly know the data that this appointment beacon frame carries after receiving appointment beacon frame for the ease of the recipient, in the time of can working as the type field value and be first kind offset, the sequence-number field that is in same cell of data with the type field represents the data content that described data to be sent comprise is carried out total hop count N of segmentation, when the type field value is second types value, represent the corresponding sequence number of one piece of data content of current carrying with the sequence-number field that the type field is in same cell of data.
Here, first cell of data specifically can be first cell of data of arranging in order that defines in the beacon frame of SSID1a correspondence; Also can be any one cell of data that defines in the beacon frame of SSID1a correspondence.
So, can realize the carrying operation of the data header that data to be sent comprise by step 406.And the carrying of the data content that comprises at data to be sent operation, because the data content that data to be sent has been comprised in the step 404 has carried out segmentation, like this, at each segment data content, can from specify beacon frame (the beacon frame of SSID1a correspondence), determine the cell of data that is used to carry this segment data content in the cell of data except that first cell of data, the type field value that makes this cell of data is second types value, the sequence number of this segment data content and this segment data content correspondence is filled in the data field and sequence-number field of this cell of data, specifically can be referring to following step 407 to step 409.
Here, default beacon frame sends the cycle can be identical with the beacon frame transmission cycle of the prior art, also can be different, no longer limit here.
Receive for the ease of the recipient and to specify the data content that is easy to know behind the beacon frame in this appointment beacon frame and the corresponding relation of data header, can be defined in when sending the corresponding beacon frame of each SSID that is associated with data to be sent, all need in this beacon frame, carry data header, one of them cell of data that promptly is provided with in the corresponding beacon frame of each SSID that is associated with data to be sent is used to carry data header, therefore, the number M of the cell of data that this step 407 need be provided with total hop count N and step 402 compares with 1 poor (being designated as M-1), rather than the number M of the cell of data of total hop count N and step 402 setting is compared.Preferably, step 407 judge total hop count N be less than or equal to the cell of data that step 402 is provided with number M and 1 poor the time, this N segment data content is defined as current each segment data content to be sent.
Need to prove, if current is to need to send data to be sent first, then can enable the pairing service of SSID of beacon frame correspondence of the carrying data to be sent of current employing, so that corresponding wireless service is provided, such as periodically sending beacon frame etc.; Certainly, the embodiment of the invention also can current be the pairing service of SSID of beacon frame correspondence that does not enable the carrying data to be sent of current employing when needing to send data to be sent first according to actual conditions, concrete condition needs concrete analysis, repeats no more here.For ease of describing, here be that example is described with the beacon frame of the carrying data to be sent of current employing for the corresponding beacon frame of SSID1a that is associated with data to be sent, situation and the SSID1a of the SSID that other are associated with data to be sent are similar, repeat no more here.
Step 408 is selected M-1 segment data content from current N segment data content.Afterwards, execution in step 409.
Here, can from current N segment data content, select M-1 segment data content in order, also can select M-1 segment data content arbitrarily.Preferably, can be designated as this M-1 segment data content of selecting is current each segment data content to be sent.
Such as, if current each segment data content to be sent is the M-1 segment data content that step 408 is selected, owing to be provided with M cell of data in the beacon frame of SSID1a correspondence, one of them cell of data is used to carry data header, then this step 409 is specially: determine that M-1 cell of data except that first cell of data is the current corresponding respectively cell of data of each segment data content to be sent, the type field value that makes M-1 cell of data except that first cell of data is second types value, and M-1 segment data content and the corresponding respectively sequence number of selecting of this M-1 segment data content is filled into respectively in the data field and sequence-number field of M-1 cell of data except that first cell of data.If current each segment data content to be sent is a step 407 judge total hop count N be less than or equal to step 402 definition cell of data number M and 1 poor the time, the N segment data content of determining, then this step 409 is specially: select N cell of data from the cell of data except that first cell of data, the type field value that makes N the cell of data of selecting is second types value, and this N segment data content and the corresponding respectively sequence number of this N segment data content are filled into respectively in the data field and sequence-number field of N the cell of data of selecting.
Here, step 406 there is no the regular time sequencing with step 407 to step 409, and it can take place simultaneously, and therefore, Fig. 4 is a kind of giving an example, and the application of the non-limiting embodiment of the invention.
Step 410 sends the beacon frame through the SSID1a correspondence of step 406 and step 409 processing.
Need to prove, if step 407 judge total hop count N be less than or equal to step 402 definition cell of data number M and 1 poor, then when executing this step 410, then finish current flow process.If step 407 is judged total hop count N poor greater than the number M of the cell of data of step 402 definition and 1, then when executing this step 410, send fully for guaranteeing data to be sent, also need execution in step 411.
Step 412 goes out M-1 segment data content from each remaining segment data content choice, carries out according to the operation in the step 406, sends until N segment data content to finish.
Here, in step 411 and the step 412 when carrying out according to the operation in the step 406, if be provided with the SSID that is associated with data to be sent in the step 401 except SSID1a, the SSID that also has other, then the corresponding beacon frame of the SSID1a that is associated with data to be sent in the step 406 can be replaced with the corresponding beacon frame of other SSID that is associated with data to be sent, also can directly utilize the corresponding beacon frame of SSID1a that is associated with data to be sent.
Need to prove, if be provided with the number of the SSID that is associated with data to be sent greater than 1 in the step 401, such as being 2, be respectively SSID1a and SSID16b, then as total hop count N during greater than M-1, can be specially:, carry out simultaneously with SSID1a and the corresponding respectively beacon frame bearer data of SSID16b according to step 406 to step 410 at the beacon frame of SSID1a correspondence; Beacon frame at the SSID16b correspondence, owing to all need to carry data header in the corresponding beacon frame of the SSID that is associated with data to be sent of each transmission, so, at data header, carry out according to the operation in the step 406, afterwards, from each remaining segment data content, whether the hop count of judging remaining data content, is then carried out according to the operation in the step 409 under situation about being less than or equal to greater than M-1; So, can be by when arriving, the default beacon frame transmission cycle sending two corresponding beacon frames of SSID that are associated with data to be sent simultaneously, thus realized the transmission of data to be sent, and then omission step 411 is to step 412.Under the situation of the hop count of judging remaining data content greater than M-1, then go out M-1 segment data content from each remaining segment data content choice, afterwards, carry out according to the operation in the step 409, afterwards, execution in step 410 again, send until N segment data content to finish.Therefore, shown in Figure 4 is a kind of giving an example, and the application of the non-limiting embodiment of the invention.And, also as can be seen, no matter send the corresponding beacon frame of SSID that data several and to be sent are associated simultaneously when a default beacon frame transmission cycle arrives, the carrying data manipulation of the beacon frame that each is corresponding with the SSID that data to be sent are associated all is similar.
So, realized the operation that utilizes beacon transmission frame number certificate that the embodiment of the invention provides by aforesaid operations.Certainly, the data header that comprises at data to be sent in the embodiment of the invention is then carried out according to the method for data content, repeats no more here.
Need to prove that in the embodiment of the invention, when the network equipment starts such as wireless client or when receiving user's configuration order, this network equipment obtains the beacon frame on the channel of self supporting.Wherein, the channel information of network equipment support has been configured on the network equipment in advance, and so, the network equipment is easy to each channel of knowing that self supports, and goes each channel of its support to obtain the beacon frame.Here, the beacon frame that the network equipment obtains has comprised the beacon frame that has carried management information in the prior art, also comprised carrying that the embodiment of the invention the provides appointment beacon frame of data (these data comprise data header and data content).
Since each with appointment beacon frame that data to be sent are associated in all carried data header that data to be sent comprise and with the corresponding SSID of this appointment beacon frame, so, after getting access to appointment beacon frame on a certain channel of the network equipment in its support, for ease of the reception of follow-up data, can form and write down the corresponding relation between the data header three that SSID that residing channel when getting access to this appointment beacon frame, this appointment beacon frame that obtains carry and this appointment beacon frame that obtains carry.Such as, the network equipment get access on the channel of self supporting 1 specify beacon after, then can form and write down the corresponding relation between the data header three that SSID that channel 1, this appointment beacon carry and this appointment beacon carry.
Afterwards, when the user need be known the corresponding relation of network equipment record, this network equipment can show that the corresponding relation that has write down is to the user according to the order that the user sends.Preferably, because channel information is the network equipment used identification information when obtaining the beacon frame, not needing the user to be concerned about, therefore, is to save resource, can only show that SSID and the data header corresponding relation between the two gives the user.So, the user can select the data message of current needs according to the corresponding relation that shows, has selected the corresponding relation of SSID1 and data header 1 such as the user.Receive user's selection when the network equipment after, in the corresponding relation that has write down, find the channel of SSID1 and data header 1 correspondence,, afterwards, directly write to collect on 1 corresponding beacon frame such as channel 1.
Because the beacon frame is to send in the cycle, therefore, after the network equipment receives user's selection, can collect the appointment beacon frame that has carried SSID1 and data header 1 on the channel that finds.After collecting appointment beacon frame, the packaged type that is adopted during according to this appointment of transmission beacon frame is resolved this appointment beacon frame, extracting data header and the data content that this appointment beacon frame carries (is specially: according to the record of the word segment among Fig. 4, the type field value that can know the cell of data of having carried data header is a first kind offset, the type field value of having carried the cell of data of data content is second types value, so, the type field value is to extract data header in the cell of data of first kind offset from this appointment beacon frame, and the type field value is to extract data content in the cell of data of second types value from this appointment beacon frame).
If data content is smaller or equal to the maximum length of data field in the cell of data of this appointment beacon frame, can know according to the description of step 403 among Fig. 4 in the cell of data of this appointment beacon frame and not have sequence-number field, that is to say, a cell of data in this appointment beacon frame can be finished the data to be sent transmission of (comprising data header and data content), so, can directly data header and the data content that extracts be shown to the user.If data content is greater than the maximum length of data field in the cell of data in this appointment beacon frame, can know to the description of step 409 according to step 404 among Fig. 4 in the cell of data of this appointment beacon frame to have sequence-number field, and carry and inserted total hop count N that data content that data to be sent comprise is divided in the sequence-number field of cell of data of data header; So, whether the data content that judgement extracts from this appointment beacon frame is N segment data content, if, arrange each segment data content according to the sequence number in the sequence-number field of each cell of data of having carried each segment data content, and the data content after will arranging is shown to the user with the data header that extracts.Certainly, if the data content that extracts from this appointment beacon frame is less than N segment data content, then this network equipment continues to collect corresponding beacon frame at next beacon frame in the transmission cycle, till collecting N segment data content, afterwards, arrange each segment data content according to the sequence number in the sequence-number field of each cell of data of having carried each segment data content, and the data content after will arranging is shown to the user with the data header that extracts.So, realized that by foregoing description the network equipment receives the beacon frame that has carried data (comprising data header and data content) that the opposite end sends.
More than be the description that method provided by the present invention is carried out, below equipment provided by the present invention be described in detail.
Referring to Fig. 5, the equipment structure chart that Fig. 5 provides for the embodiment of the invention.This equipment is applied to comprise in the WLAN (wireless local area network) of an above AP; Each AP sends an above beacon frame; This equipment comprises: designating unit 501 and transmitting element 502.
Wherein, designating unit 501 is used for specifying the beacon frame that is associated with data to be sent from the beacon frame that each AP of described WLAN sends; Described data to be sent comprise data header and data content;
Transmitting element 502 is used for when the default beacon frame transmission cycle arrives, if the current described data to be sent of transmission that need send described Data-carrying to be sent in specifying the beacon frame.
Preferably, each AP supports an above SSID in the described network, the beacon frame that different SSID is corresponding different; Designating unit 501 is provided with the SSID that is associated with data to be sent, specifies the corresponding beacon frame of beacon frame for being associated with data to be sent of SSID that is associated with data to be sent.
As shown in Figure 5, this equipment can comprise: definition unit 503;
During transmitting element 502 specific implementations multiple version can be arranged, below be example with a kind of structure only.
As shown in Figure 5, a kind of structure of transmitting element 502 is:
Transmitting element 502 can comprise: first inserts subelement 5021, second inserts subelement 5022 and sends subelement 5023.
First inserts subelement 5021 is used for definition according to definition unit 503, making and specifying the type field value of first cell of data in the beacon frame is first kind offset, and the data header that described data to be sent are comprised is filled in the data field of described first cell of data;
Second inserts subelement 5022 is used for definition according to definition unit 503, making the type field value of the cell of data except that described first cell of data in the described appointment beacon frame is second types value, described data content is filled in the data field of this cell of data.
If the data content that data to be sent comprise is smaller or equal to the maximum length of data field in the cell of data, second inserts subelement 5022 is used for definition according to definition unit 503, making the type field value of the cell of data except that described first cell of data in the described appointment beacon frame is second types value, described data content is filled in the data field of this cell of data.
If the data content that data to be sent comprise is greater than the maximum length of data field in the cell of data, definition unit 503 also is used for described data content is carried out segmentation, and every segment data content has corresponding sequence number; Go back the defined nucleotide sequence field in each cell of data, when described type field value was first kind offset, the sequence-number field that is in same cell of data with the type field was represented total hop count N of described data content; When described type field value was second types value, the sequence-number field that is in same cell of data with the type field was represented the corresponding sequence number of current data carried by data inclusive segment;
First inserts the sequence-number field that subelement 5021 also is used for total hop count N is filled into described first cell of data;
Second inserts subelement 5022 at each segment data content, determine the cell of data that is used to carry this segment data content in the cell of data from described appointment beacon frame except that first cell of data, the type field value that makes this cell of data is second types value, and the sequence number of this segment data content and this segment data content correspondence is filled in the data field and sequence-number field of this cell of data.
Above-mentioned is the description that the structure of data transmission set that the embodiment of the invention is provided is carried out, and the structure of the data receiver that the embodiment of the invention is provided is described below.
Referring to Fig. 6, the structure chart of the data receiver that Fig. 6 provides for the embodiment of the invention.This equipment is applied to comprise among the WLAN of an above AP; Each AP sends an above beacon frame; As shown in Figure 6, this equipment can comprise: receiving element 601 and processing unit 602.
Wherein, receiving element 601 is used for receiving on the channel that pre-configured self supported and has carried the appointment beacon frame of data to be sent, and described data to be sent comprise data header and data content;
As shown in Figure 6, this equipment also can comprise: record cell 603.
Preferably, receiving element 601 also is used for receiving the corresponding relation that the user selects according to current needs at the corresponding relation of record cell 603 demonstrations, and collects corresponding appointment beacon frame on the corresponding channel according to choosing of user;
As shown in Figure 6, processing unit 602 can comprise: extract subelement 6021 and show subelement 6022.
Wherein, extracting subelement 6021 is used for receiving element 601 is collected corresponding appointment beacon frame according to user's selection after, resolve this appointment beacon frame according to the packaged type that this appointment of transmission beacon frame is adopted, and extract data header and data content that this appointment beacon frame carries;
Show that subelement 6022 is used for when the data content that described data to be sent comprise is less than or equal to the maximum length of cell of data data field, data header and data content that extraction subelement 6022 is extracted are shown to the user; Data content that described data to be sent comprise greater than cell of data in during the maximum length of data field, total hop count N in the sequence-number field of the cell of data at specified data title place, judge whether the data content that extracts is N segment data content, if, arrange each segment data content according to the sequence number in the sequence-number field of each cell of data of having carried each segment data content, and the data content after will arranging is shown to the user with the data header that extracts; Otherwise, at the data content that extracts during less than N segment data content, trigger described receiving element and continue to collect corresponding appointment beacon frame in the transmission cycle at the default beacon frame of the next one, till collecting N segment data content, afterwards, arrange each segment data content according to the sequence number in the sequence-number field of each cell of data of having carried each segment data content, and the data content after will arranging is shown to the user with the data header that extracts.
In sum, in the method and apparatus provided by the invention, be not to utilize traditional Frame broadcast data in the prior art, but utilize beacon Beacon frame to carry data.Those skilled in the art will know that, Beacon frame and requiring unlike Frame of the prior art has only the network equipment that is associated with the AP that sends this Beacon frame just can receive this Beacon frame such as client etc., such as, there are 1920 clients in the intranet, because an access point can only insert 64 clients in the prior art, for guaranteeing that clients all in the current intranet can both receive data, just 30 access points need be set in this intranet, and because Beacon frame and unlike Frame of the prior art, need have only the network equipment that is associated with the AP of transmission Beacon frame just can receive the Beacon frame, so, as long as the Beacon frame bearer data that an AP is sent, just can make 1920 clients can both receive this Beacon frame, like this, having avoided the number of the client that is associated owing to access point in the prior art is the limited defective that causes.
Further, owing to utilize among the present invention the Beacon frame bearer data can make the all-network equipment the AP that removes this Beacon frame of transmission in the network can both receive this Beacon frame, that is to say, pass through Beacon transmission frame number certificate in the embodiment of the invention, and unlike utilizing the data frame transfer data need the quantity of data receiving terminal be limited in the prior art, so, just the complexity that the current access point of network also needs to increase again access point inadequately can not occur, and then can significantly reduce network size yet;
The beacon frame that is associated with data to be sent is specified in the beacon frame that all AP send from current WLAN in the embodiment of the invention in a nearlyer step ground, can realize specifying AP to send the function of data.
The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being made, is equal to replacement, improvement etc., all should be included within the scope of protection of the invention.
Claims (14)
1, the method for transfer of data in a kind of WLAN (wireless local area network), this method is applied to comprise among the WLAN (wireless local area network) WLAN of an above access point AP; Each AP sends an above beacon beacon frame; It is characterized in that this method comprises:
A makes the beacon frame that is associated with data to be sent from the beacon frame middle finger that each AP sends;
B, if the current described data to be sent of transmission that need when the default beacon frame transmission cycle arrives, send described Data-carrying to be sent in specifying the beacon frame, described data to be sent comprise data header and data content.
2, method according to claim 1 is characterized in that, each AP supports service combination identification code SSID more than, the beacon frame that different SSID is corresponding different in the described network;
Appointment in the described steps A comprises: the SSID that is associated with data to be sent is set; Specify the corresponding beacon frame of beacon frame of SSID that is associated with data to be sent for being associated with data to be sent.
3, method according to claim 1, it is characterized in that, in specifying the beacon frame, define at least 2 cell of data that are used to carry data to be sent in advance, and the maximum total length of all cell of data is smaller or equal to the maximum length of specifying frame body field in the beacon frame; And in each cell of data define styles field and data field; The value of described type field comprises second types value that is used to represent the first kind offset of data header and is used to represent data content; Transmission among the described step B comprises:
B1, making and specifying the type field value of first cell of data in the beacon frame is first kind offset, the data header that described data to be sent are comprised is filled in the data field of described first cell of data;
B2, making the type field value of the cell of data except that described first cell of data in the described appointment beacon frame is second types value, described data content is filled in the data field of this cell of data;
B3 sends the appointment beacon frame through described step B1 and described step B2 processing.
4, method according to claim 3, it is characterized in that, if the data content that described data to be sent comprise is less than or equal to the maximum length of data field in the cell of data, described step B2 comprises: making and specifying the type field value of one of them cell of data except that first cell of data in the beacon frame is second types value, and the data content that data to be sent are comprised is filled in the data field of this cell of data.
5, method according to claim 3, it is characterized in that, if the data content that described data to be sent comprise then carries out segmentation to described data content in advance greater than the maximum length of data field in the cell of data, every segment data content has corresponding sequence number; Go back the defined nucleotide sequence field in each cell of data, when described type field value was first kind offset, the sequence-number field that is in same cell of data with the type field was represented total hop count N of described data content; When described type field value was second types value, the sequence-number field that is in same cell of data with the type field was represented the corresponding sequence number of current data carried by data inclusive segment;
Described step B1 further comprises: total hop count N is filled in the sequence-number field of described first cell of data;
Described step B2 comprises: at each segment data content, determine the cell of data that is used to carry this segment data content in the cell of data from described appointment beacon frame except that first cell of data, the type field value that makes this cell of data is second types value, and the sequence number of this segment data content and this segment data content correspondence is filled in the data field and sequence-number field of this cell of data.
6, according to claim 4 or 5 described methods, it is characterized in that, after finishing the transmission of specifying the beacon frame, further comprise: the network equipment among the described WLAN obtains described appointments beacon frame on the channel of self supporting, forms and write down described corresponding relation of specifying between the SSID of the residing channel of beacon frame, described appointment beacon frame correspondence and the data header three that described appointment beacon frame carries; With the described corresponding relation or the SSID of the appointment beacon frame correspondence in the described corresponding relation of record with specify the corresponding relation between the data header that the beacon frame carries to be shown to the user.
7, method according to claim 6 is characterized in that, when receiving the corresponding relation that the user selects according to current demand in the corresponding relation that the described network equipment shows, further comprises:
Collect corresponding appointment beacon frame on the corresponding channel according to choosing of user, after collecting this appointment beacon frame, resolve this appointment beacon frame according to the packaged type that this appointment of transmission beacon frame is adopted, extract data header and data content that this appointment beacon frame carries;
If the data content that described data to be sent comprise is less than or equal to the maximum length of data field in the cell of data, then data header and the data content that extracts is shown to the user;
If the data content that described data to be sent comprise is greater than the maximum length of data field in the cell of data, the total hop count N in the sequence-number field of the cell of data at specified data title place then, judge whether the data content that extracts is N segment data content, if, arrange each segment data content according to the sequence number in the sequence-number field of each cell of data of having carried each segment data content, and the data content after will arranging is shown to the user with the data header that extracts; Otherwise, at the data content that extracts during less than N segment data content, continue to collect corresponding appointment beacon frame in the transmission cycle at the default beacon frame of the next one, till collecting N segment data content, arrange each segment data content according to the sequence number in the sequence-number field of each cell of data of having carried each segment data content, and the data content after will arranging is shown to the user with the data header that extracts.
8, a kind of data transmission set, this equipment are applied to comprise among the WLAN WLAN of an above access point AP; Each AP sends an above beacon beacon frame; It is characterized in that this equipment comprises: designating unit and transmitting element;
Described designating unit is used for making the beacon frame that is associated with data to be sent from the beacon frame middle finger that each AP of described WLAN sends;
Described transmitting element is used for when the default beacon frame transmission cycle arrives, if the current described data to be sent of transmission that need send described Data-carrying to be sent in specifying the beacon frame, described data to be sent comprise data header and data content.
9, equipment according to claim 8 is characterized in that, each AP supports service combination identification code SSID more than, the beacon frame that different SSID is corresponding different in the described network; The SSID that described designating unit setting is associated with data to be sent specifies the corresponding beacon frame of beacon frame for being associated with data to be sent of SSID that is associated with data to be sent.
10, equipment according to claim 8 is characterized in that, described data to be sent comprise data header and data content; This equipment also comprises: definition unit;
The definition in specifying the beacon frame of described definition unit is used to carry at least 2 cell of data of data to be sent, and the maximum total length of all cell of data is smaller or equal to the maximum length of specifying frame body field in the beacon frame; And in each cell of data define styles field and data field; The value of described type field comprises second types value that is used to represent the first kind offset of data header and is used to represent data content;
Described transmitting element comprises:
First inserts subelement, be used for definition according to described definition unit, making and specifying the type field value of first cell of data in the beacon frame is first kind offset, and the data header that described data to be sent are comprised is filled in the data field of described first cell of data;
Second inserts subelement, be used for definition according to described definition unit, making the type field value of the cell of data except that described first cell of data in the described appointment beacon frame is second types value, described data content is filled in the data field of this cell of data;
Send subelement, be used to send and insert the appointment beacon that subelement and second is inserted the subelement processing through described first.
11, equipment according to claim 10, it is characterized in that, if the data content that described data to be sent comprise is greater than the maximum length of data field in the cell of data, described definition unit also is used for described data content is carried out segmentation, and every segment data content has corresponding sequence number; Go back the defined nucleotide sequence field in each cell of data, when described type field value was first kind offset, the sequence-number field that is in same cell of data with the type field was represented total hop count N of described data content; When described type field value was second types value, the sequence-number field that is in same cell of data with the type field was represented the corresponding sequence number of current data carried by data inclusive segment;
Described first inserts the sequence-number field that subelement also is used for total hop count N is filled into described first cell of data;
Described second inserts subelement at each segment data content, determine the cell of data that is used to carry this segment data content in the cell of data from described appointment beacon frame except that first cell of data, the type field value that makes this cell of data is second types value, and the sequence number of this segment data content and this segment data content correspondence is filled in the data field and sequence-number field of this cell of data.
12, a kind of data receiver, this equipment are applied to comprise among the WLAN (wireless local area network) WLAN of an above access point AP; Each AP sends an above beacon beacon frame; It is characterized in that this equipment comprises:
Receiving element is used for receiving on the pre-configured channel of self supporting and has carried the appointment beacon frame of data to be sent, and described data to be sent comprise data header and data content;
Processing unit is used for extracting described data header and described data content from the appointment beacon frame that described receiving element receives, and data header and the data content that extracts is provided.
13, data receiver according to claim 12 is characterized in that, this equipment also comprises:
Record cell, be used for described receiving element receive specify the beacon frame after, the corresponding relation when forming and writing down described receiving element and receiving this appointment beacon frame between the SSID of residing channel, this appointment beacon frame correspondence and the data header three that this appointment beacon frame carries; With the described corresponding relation or the SSID of the appointment beacon frame correspondence in the described corresponding relation of record with specify the corresponding relation between the data header that the beacon frame carries to be shown to the user.
14, data receiver according to claim 13, it is characterized in that, described receiving element also is used for receiving the corresponding relation that the user selects according to current needs at the corresponding relation of described record cell demonstration, and collects corresponding appointment beacon frame on the corresponding channel according to choosing of user;
Described processing unit comprises:
Extract subelement, be used for receiving element is collected corresponding appointment beacon frame according to user's selection after, resolve this appointment beacon frame according to the packaged type that this appointment of transmission beacon frame is adopted, and extract data header and data content that this appointment beacon frame carries;
Show subelement, be used for when the data content that described data to be sent comprise is less than or equal to the maximum length of cell of data data field that data header and data content that described extraction subelement is extracted are shown to the user; Data content that described data to be sent comprise greater than cell of data in during the maximum length of data field, total hop count N in the sequence-number field of the cell of data at specified data title place, judge whether the data content that extracts is N segment data content, if, arrange each segment data content according to the sequence number in the sequence-number field of each cell of data of having carried each segment data content, and the data content after will arranging is shown to the user with the data header that extracts; Otherwise, at the data content that extracts during less than N segment data content, trigger described receiving element and continue to collect corresponding appointment beacon frame in the transmission cycle at the default beacon frame of the next one, till collecting N segment data content, afterwards, arrange each segment data content according to the sequence number in the sequence-number field of each cell of data of having carried each segment data content, and the data content after will arranging is shown to the user with the data header that extracts.
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| CN2009100890854A CN101631358B (en) | 2009-07-28 | 2009-07-28 | Method for transmitting data in wireless local area network and equipment thereof |
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| CN2009100890854A CN101631358B (en) | 2009-07-28 | 2009-07-28 | Method for transmitting data in wireless local area network and equipment thereof |
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| CN101631358A true CN101631358A (en) | 2010-01-20 |
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| CN104219065A (en) * | 2014-07-31 | 2014-12-17 | 北京升哲科技有限公司 | Beacon-based broadcasting method and Beacon equipment |
| US9198137B2 (en) | 2011-07-28 | 2015-11-24 | Broadcom Corporation | Network controlled filtering over wireless device communications |
| CN105282260A (en) * | 2015-11-17 | 2016-01-27 | 北京奇虎科技有限公司 | File transmission method, wearable device and cloud server |
| CN105933952A (en) * | 2015-02-27 | 2016-09-07 | 中兴通讯股份有限公司 | A plurality of beacon types used in wireless communication |
| CN106507289A (en) * | 2016-12-07 | 2017-03-15 | 广东欧珀移动通信有限公司 | A kind of cut-in method of wireless network and mobile terminal |
| CN109874157A (en) * | 2017-12-04 | 2019-06-11 | 成都鼎桥通信技术有限公司 | A kind of RN supports the method and system of LTE and WLAN convergence |
| CN110769485A (en) * | 2014-09-19 | 2020-02-07 | 小米科技有限责任公司 | Method for making target terminal access target wireless network provided by wireless access point |
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| US7236460B2 (en) * | 2002-03-29 | 2007-06-26 | Airmagnet, Inc. | Detecting a counterfeit access point in a wireless local area network |
| EP1714430B1 (en) * | 2004-02-06 | 2009-02-11 | Koninklijke Philips Electronics N.V. | Dynamic beacon period in a mac distributed reservation protocol |
| CN1968261B (en) * | 2005-11-14 | 2011-05-25 | 联想(北京)有限公司 | Method for resource sharing in WLAN |
| KR100878538B1 (en) * | 2006-11-13 | 2009-01-13 | 삼성전자주식회사 | Method and apparatus for allocating bandwidth on wireless network, and method and apparatus for transceving data on the network |
| CN101483894B (en) * | 2009-01-06 | 2010-08-11 | 北京交通大学 | Fast switching method for WLAN |
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| US9198137B2 (en) | 2011-07-28 | 2015-11-24 | Broadcom Corporation | Network controlled filtering over wireless device communications |
| CN104219065B (en) * | 2014-07-31 | 2017-09-29 | 北京升哲科技有限公司 | Broadcasting method and Beacon equipment based on Beacon |
| WO2016015373A1 (en) * | 2014-07-31 | 2016-02-04 | 北京升哲科技有限公司 | Beacon-based broadcast method and beacon device |
| CN104219065A (en) * | 2014-07-31 | 2014-12-17 | 北京升哲科技有限公司 | Beacon-based broadcasting method and Beacon equipment |
| CN110769485A (en) * | 2014-09-19 | 2020-02-07 | 小米科技有限责任公司 | Method for making target terminal access target wireless network provided by wireless access point |
| CN105933952A (en) * | 2015-02-27 | 2016-09-07 | 中兴通讯股份有限公司 | A plurality of beacon types used in wireless communication |
| CN105933952B (en) * | 2015-02-27 | 2020-04-24 | 中兴通讯股份有限公司 | Using multiple beacon types in wireless communications |
| CN105282260A (en) * | 2015-11-17 | 2016-01-27 | 北京奇虎科技有限公司 | File transmission method, wearable device and cloud server |
| CN105282260B (en) * | 2015-11-17 | 2018-05-29 | 北京奇虎科技有限公司 | Document transmission method, wearable device and cloud server |
| CN106507289A (en) * | 2016-12-07 | 2017-03-15 | 广东欧珀移动通信有限公司 | A kind of cut-in method of wireless network and mobile terminal |
| US11212677B2 (en) | 2016-12-07 | 2021-12-28 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Method for accessing wireless network, and terminal device |
| US11153808B2 (en) | 2017-03-23 | 2021-10-19 | Zte Corporation | Using multiple beacon types in wireless communication |
| CN109874157A (en) * | 2017-12-04 | 2019-06-11 | 成都鼎桥通信技术有限公司 | A kind of RN supports the method and system of LTE and WLAN convergence |
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Address after: 310052 Binjiang District Changhe Road, Zhejiang, China, No. 466, No. Patentee after: Xinhua three Technology Co., Ltd. Address before: 310053 Hangzhou hi tech Industrial Development Zone, Zhejiang province science and Technology Industrial Park, No. 310 and No. six road, HUAWEI, Hangzhou production base Patentee before: Huasan Communication Technology Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111221 Termination date: 20200728 |