CN104113490A - Wireless network data transmitting method and device - Google Patents
Wireless network data transmitting method and device Download PDFInfo
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- CN104113490A CN104113490A CN201410362501.4A CN201410362501A CN104113490A CN 104113490 A CN104113490 A CN 104113490A CN 201410362501 A CN201410362501 A CN 201410362501A CN 104113490 A CN104113490 A CN 104113490A
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Abstract
The invention provides a wireless network data transmitting method and device. The method comprises, when reaching a preset cycle, determining whether newly-added data massages to be transmitted exist in a cache queue corresponding to a target STA (station); if so, transmitting the data messages to be transmitted to the target STA and determining a BA (block acknowledgement) structure currently corresponding to the target STA meets the destroy conditions, and if so, transmitting indication deleting messages to the target STA to destroy the BA structure and to establish a new BA structure with the target STA. The wireless network data transmitting method and device can improve the stability of data communication.
Description
Technical field
The present invention relates to wireless communication technology, relate in particular to a kind of radio network data transmitting method and device thereof.
Background technology
Along with mobile terminal technology and WLAN (wireless local area network) (Wireless Local Area Networks, be called for short WLAN) fast development of technology, website (Station in WLAN, be called for short STA) quantity also more and more, as in e-schoolbag scene, a WAP (wireless access point) (Access Point the is called for short AP) row data communication of going forward side by side that need to be connected with many STA, to realize Informalized teaching.
In prior art, before having specified that in 802.11n agreement AP and STA carrying out data communication, model piece is confirmed (Block Acknowledgement, be called for short BA) process, send ADDBAREQ message negotiation by AP and set up BA structure, STA replys ADDBA RESP as replying, after consulting successfully, AP can send limited multiple data message, STA retains the accepting state of these data messages, after receiving the BA Req message that AP sends, STA responds with BA message the multiple data messages that receive is before done to disposable reply.When STA receives after the DELBA message of AP transmission, disconnect BA mutual, destroy BA structure.
But in the prior art, once there be message to mail to STA, AP just need to judge whether to destroy BA structure, make that going offline appears in communicating by letter of AP and STA, the probability of data flash is very large, cause data communication less stable.
Summary of the invention
The invention provides a kind of radio network data transmitting method and device thereof, in order to improve the stability of data communication.
The invention provides a kind of radio network data transmitting method, comprising:
In the time that predetermined period arrives, judge in the buffer queue corresponding with target STA whether have newly-increased data message to be sent;
If knowing, judgement there is newly-increased data message to be sent, send described data message to be sent to described target STA, and continue to judge whether the BA structure that current and described target STA is corresponding meets destruction condition, if meet, send and delete instruction message to described target STA, to destroy described BA structure, and set up new BA structure with described target STA.
The present invention also provides a kind of wireless network data dispensing device, comprising:
Judge module, in the time that predetermined period arrives, judges in the buffer queue corresponding with target STA whether have newly-increased data message to be sent;
The first processing module, for judging the data message to be sent of knowing that existence is newly-increased, send described data message to be sent to described target STA, and continue to judge whether the BA structure that current and described target STA is corresponding meets destruction condition, if meet, send and delete instruction message to described target STA, to destroy described BA structure, and set up new BA structure with described target STA.
Radio network data transmitting method provided by the invention and device thereof, by setting predetermined period, judge in the buffer queue corresponding with target STA whether have newly-increased data message to be sent; If knowing, judgement there is newly-increased data message to be sent, send data message to be sent to target STA, and continue to judge whether the current BA structure corresponding with target STA meets destruction condition, if meet, send and delete instruction message to target STA, to destroy BA structure, and set up new BA structure with target STA.Because AP is after predetermined period arrives, just judge whether to destroy BA structure, improve the stability of data communication.
Brief description of the drawings
Fig. 1 is the application scenarios schematic diagram of radio network data transmitting method of the present invention;
Fig. 2 is the schematic flow sheet of radio network data transmitting method embodiment mono-of the present invention;
Fig. 3 is the schematic flow sheet of radio network data transmitting method embodiment bis-of the present invention;
Fig. 4 is the structural representation of wireless network data dispensing device embodiment mono-of the present invention;
Fig. 5 is the structural representation of wireless network data dispensing device embodiment bis-of the present invention.
Embodiment
Fig. 1 is the application scenarios schematic diagram of radio network data transmitting method of the present invention, as shown in Figure 1, in e-schoolbag application scenarios, server 11 is commonly referred to as teacher computer, all kinds of teaching softwares are housed above, and STA 15 is commonly referred to as various terminal equipments, for example, can be pad, net book, mobile phone etc., teaching software client software is housed above, by AP 14, each STA 15 is connected together and carries out data communication.Wireless controller 12 is a kind of network equipments, is used for centralization control wireless aps, is the core of a wireless network, is in charge of all wireless aps in wireless network, and server 11 is connected by switch 13 with AP 14, carries out data interaction.Conventionally, below an AP, to access many STA, and in teaching process, to ensure that every station terminal can normally receive picture, displaying video, issue the business such as courseware, any STA goes wrong and can cause teaching to be obstructed, therefore, in e-schoolbag application scenarios, require very high to the communication stability of AP and STA.
Fig. 2 is the schematic flow sheet of radio network data transmitting method embodiment mono-of the present invention, and the executive agent of the embodiment of the present invention one is AP, and as shown in Figure 1, the method for the present embodiment can comprise:
Step 201, in the time that predetermined period arrives, judge in the buffer queue corresponding with target STA whether have newly-increased data message to be sent.
In the present embodiment, predetermined period can be set to 1s, 2s etc. according to actual needs flexibly.In concrete implementation procedure, can be rule of thumb or the suitable predetermined period of how many selections of data message quantity, for example, in the time that the quantity of data message is more, choose 2s, in the time of the negligible amounts of data message, choose 1s.For choosing of the occurrence of predetermined period, the present embodiment is not particularly limited at this.
Particularly, the AP row data communication of going forward side by side that is connected with multiple STA, each STA has each self-corresponding buffer queue, and AP can regularly upgrade the buffer queue of each STA.When arriving after predetermined period, AP can travel through the buffer queue that all STA are corresponding, judges in the corresponding buffer queue of STA, whether there is newly-increased data message to be sent with this.
If knowing, step 202 judgement there is newly-increased data message to be sent, send described data message to be sent to described target STA, and continue to judge whether the BA structure that current and described target STA is corresponding meets destruction condition, if meet, send and delete instruction message to described target STA, to destroy described BA structure, and set up new BA structure with described target STA.
It will be understood by those skilled in the art that destroying BA structure is mainly the relevant information of BA state machine of resetting in device software, this relevant information can be for example the number of retransmissions of AP, the maximum message number etc. that receives.The destruction condition of BA structure comprises that the sequence number of data message is greater than length of window, and the number of retransmissions of data message is greater than certain number of times etc.In the present embodiment, being greater than length of window taking the sequence number of data message describes as example.
When AP sends datagram to target STA, for each data message distributes a unique sequence number, this sequence number increases progressively from small to large successively, for example: the data message sequence number of first transmission is 1, the data message sequence number of second transmission is 2 ... in the time that sequence of message number is greater than length of window, AP sends DELBA message to target STA, and the BA structure corresponding with target STA destroyed.Wherein, length of window arranges according to actual needs.
Particularly, in the prior art, in the time that AP and STA carry out data communication, once AP has data message to mail to STA, will judge whether to destroy BA structure, if meet destruction condition, AP sends DELBA message to target STA, for the BA structure corresponding with target STA destroyed, and, BA state machine moves to the state that communication disconnects, therefore, between AP and target STA, to continue data communication, need to re-establish a new BA structure, and during re-establishing BA structure, not allow data message communication, this just causes data communication to be interrupted, until successfully set up BA structure.In the prior art, because AP can judge whether at any time to destroy BA structure in communication process, increase the probability that data communication is interrupted, caused communication process unstable.
And in the present embodiment, when AP knows by setting predetermined period judgement the data message to be sent that in the buffer queue corresponding with target STA, existence increases newly, whether the judgement BA structure corresponding with this target STA meets destruction condition.By adopting predetermined period to judge, can eliminate the randomness that data communication is interrupted, and reduce the probability of communication disruption, improve communication stability.
The radio network data transmitting method that the present embodiment provides, by setting predetermined period, judges in the buffer queue corresponding with target STA whether have newly-increased data message to be sent; If knowing, judgement there is newly-increased data message to be sent, send data message to be sent to target STA, and continue to judge whether the current BA structure corresponding with target STA meets destruction condition, if meet, send and delete instruction message to target STA, to destroy BA structure, and set up new BA structure with target STA.Because AP is after predetermined period arrives, just judge whether to destroy BA structure, improve the stability of data communication.
Further, radio network data transmitting method as above, wherein, by starting a timer, carries out timing to predetermined period.This timer can be realized by software and/or hardware, and in the present embodiment, this timer can be integrated in AP.
Adopt a specific embodiment below, the technical scheme of embodiment of the method shown in Fig. 2 is elaborated.
Fig. 3 is the schematic flow sheet of radio network data transmitting method embodiment bis-of the present invention, the present embodiment is on the basis of radio network data transmitting method embodiment mono-, to whether there being the embodiment of newly-increased data message to be sent in the judgement buffer queue corresponding with target STA, elaborate.As shown in Figure 3, the method for the present embodiment can comprise:
Step 301, obtain the data message of current institute buffer memory in buffer queue and the first message number having sent datagram, and obtain the data message of previous predetermined period institute buffer memory in buffer queue and the second message number having sent datagram.
In the present embodiment, the data message of current institute buffer memory comprises: newly-increased data message and the data message not sending; Send datagram and comprise: send the data message of losing in successful data message and process of transmitting.In actual application, the data message of current institute buffer memory and the number having sent datagram in AP timing acquisition buffer queue, with the data message of previous predetermined period time institute buffer memory and the number having sent datagram, for example, when predetermined period is set to 2s, AP obtains the data message of current time institute buffer memory in buffer queue and the number having sent datagram, as the first message number, obtain the data message of the front institute of 2s buffer memory and the number having sent datagram, as the second message number simultaneously.
Step 302, the first message number is deducted to the second message number.
Concrete, AP can judge in buffer queue, whether there is newly-increased data message to be sent according to formula (1.1):
P(t)＝L(t)-L(t-n)； (1.1)
Wherein, t is current time, n is predetermined period, P (t) is newly-increased data message to be sent, L (t) is data message and the number that sent datagram of current institute buffer memory in buffer queue, and L (t-n) is data message and the number that sent datagram of institute's buffer memory in buffer queue when n second before in buffer queue.
Step 303, judge whether difference is greater than zero.
In this step, if judge, difference is greater than zero, performs step 304, otherwise, execution step 305.
Step 304, the newly-increased data message to be sent of existence, send data message to be sent to target STA, and continue to judge whether the current BA structure corresponding with target STA meets destruction condition, if meet, send and delete instruction message to target STA, to destroy BA structure, and set up new BA structure with target STA.
This step is similar with the step 202 in the embodiment of the present invention one, does not repeat them here.
Step 305, there is not newly-increased data message to be sent, continue to maintain the current BA structure corresponding with target STA.
The radio network data transmitting method that the present embodiment provides, by being set, obtains predetermined period data message and the number that sent datagram of previous predetermined period institute buffer memory in the data message of current institute buffer memory in buffer queue and sent datagram number and buffer queue, judge whether to exist newly-increased data message to be sent, if knowing, judgement there is newly-increased data message to be sent, send data message to be sent to target STA, and continue to judge whether the current BA structure corresponding with target STA meets destruction condition, if meet, send and delete instruction message to target STA, to destroy BA structure, and set up new BA structure with target STA.Because AP is after predetermined period arrives, just judge whether to destroy BA structure, improve the stability of data communication.
Preferably, radio network data transmitting method as above, wherein, by setting up packet filtering device, according to predetermined, with the corresponding transmission priority of all kinds of messages, send message; Described message comprises administrative message and controls message.
Particularly, in prior art, the priority that wireless protocols specifies has 4: video, audio frequency, do one's best, background, in the time that data message quantity is very large, the administrative message that part is crucial and control message can not get preferential transmission, and this can cause some crucial processing to produce time delay.In the present embodiment, by setting up packet filtering device, according to what be scheduled to, with the corresponding transmission priority of all kinds of messages, the administrative message of transmitting portion key and control message, for example: ADDBA REQ, DELBA, ASSOC RESP etc. is crucial message, PROBE RESP, MULTI DATA, EAPOL-KEY etc. are time crucial message, TCP, UDP etc. are common message, and successively by crucial message, inferior crucial message and common message are given video, audio frequency, the priority of doing one's best, and then be distributed to the hardware message queue that priority is different, according to video priority, the order of audio priory level and the priority of doing one's best sends the crucial message in administrative message successively, inferior crucial message and common message, according to video priority, the order of audio priory level and the priority of doing one's best sends the crucial message of controlling in message successively, inferior crucial message and common message, ensure that with this administrative message or the crucial message of controlling in message can send in time.It will be understood by those skilled in the art that packet filtering device can realize by software, in the present embodiment, this packet filtering device can be integrated in AP.
Fig. 4 is the structural representation of wireless network data dispensing device embodiment mono-of the present invention, and as shown in Figure 4, the wireless network data dispensing device that the embodiment of the present invention provides comprises:
Judge module 401, in the time that predetermined period arrives, judges in the buffer queue corresponding with target STA whether have newly-increased data message to be sent;
The first processing module 402, for judging the data message to be sent of knowing that existence is newly-increased, send described data message to be sent to described target STA, and continue to judge whether the BA structure that current and described target STA is corresponding meets destruction condition, if meet, send and delete instruction message to described target STA, to destroy described BA structure, and set up new BA structure with described target STA.
The wireless network data dispensing device that the present embodiment provides, by setting predetermined period, judges in the buffer queue corresponding with target STA whether have newly-increased data message to be sent; If knowing, judgement there is newly-increased data message to be sent, send data message to be sent to target STA, and continue to judge whether the current BA structure corresponding with target STA meets destruction condition, if meet, send and delete instruction message to target STA, to destroy BA structure, and set up new BA structure with target STA.Because AP is after predetermined period arrives, just judge whether to destroy BA structure, improve the stability of data communication.
Fig. 5 is the structural representation of wireless network data dispensing device embodiment bis-of the present invention, and as shown in Figure 5, described judge module 401 comprises:
Acquiring unit 4011, for obtaining the data message of the current institute of described buffer queue buffer memory and the first message number having sent datagram, and obtain the data message of previous predetermined period institute buffer memory in described buffer queue and the second message number having sent datagram;
Judging unit 4012, for described the first message number is deducted to described the second message number, if difference is greater than zero, the data message to be sent that existence is newly-increased is known in judgement.
Alternatively, described device also comprises:
The second processing module 403, knows and does not have newly-increased data message to be sent for judging, continues to maintain BA structure corresponding to described current and described target STA.
Alternatively, described device also comprises:
Sending module 404, for by packet filtering device, according to predetermined, with the corresponding transmission priority of all kinds of messages, send message; Described message comprises administrative message and controls message.
Alternatively, described administrative message and control message comprise respectively crucial message, inferior crucial message and common message, correspondingly, described sending module 404 specifically for:
Send successively the crucial message in described administrative message, inferior crucial message and common message according to the order of video priority, audio priory level and the priority of doing one's best;
Send successively the crucial message in described control message, inferior crucial message and common message according to the order of video priority, audio priory level and the priority of doing one's best.
The wireless network data dispensing device that the present embodiment provides, by being set, obtains predetermined period data message and the number that sent datagram of previous predetermined period institute buffer memory in the data message of current institute buffer memory in buffer queue and sent datagram number and buffer queue, judge whether to exist newly-increased data message to be sent, if knowing, judgement there is newly-increased data message to be sent, send data message to be sent to target STA, and continue to judge whether the current BA structure corresponding with target STA meets destruction condition, if meet, send and delete instruction message to target STA, to destroy BA structure, and set up new BA structure with target STA.Because AP is after predetermined period arrives, just judge whether to destroy BA structure, improve the stability of data communication.
One of ordinary skill in the art will appreciate that: all or part of step that realizes above-mentioned each embodiment of the method can complete by the relevant hardware of program command.Aforesaid program can be stored in a computer read/write memory medium.This program, in the time carrying out, is carried out the step that comprises above-mentioned each embodiment of the method; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CDs.
Finally it should be noted that: above each embodiment, only in order to technical scheme of the present invention to be described, is not intended to limit; Although the present invention is had been described in detail with reference to aforementioned each embodiment, those of ordinary skill in the art is to be understood that: its technical scheme that still can record aforementioned each embodiment is modified, or some or all of technical characterictic is wherein equal to replacement; And these amendments or replacement do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.
Claims (10)
1. a radio network data transmitting method, is characterized in that, comprising:
In the time that predetermined period arrives, judge in the buffer queue corresponding with target STA whether have newly-increased data message to be sent;
If knowing, judgement there is newly-increased data message to be sent, send described data message to be sent to described target STA, and continue to judge whether the BA structure that current and described target STA is corresponding meets destruction condition, if meet, send and delete instruction message to described target STA, to destroy described BA structure, and set up new BA structure with described target STA.
2. method according to claim 1, is characterized in that, in the described judgement buffer queue corresponding with target STA, whether has newly-increased data message to be sent, comprising:
Obtain the data message of current institute buffer memory in described buffer queue and the first message number having sent datagram, and obtain the data message of previous predetermined period institute buffer memory in described buffer queue and the second message number having sent datagram;
Described the first message number is deducted to described the second message number, if difference is greater than zero, the data message to be sent that existence is newly-increased is known in judgement.
3. method according to claim 1, is characterized in that, also comprises:
There is not newly-increased data message to be sent if judgement is known, continue to maintain BA structure corresponding to described current and described target STA.
4. according to the method described in claims 1 to 3 any one, it is characterized in that, also comprise:
By packet filtering device, according to predetermined, with the corresponding transmission priority of all kinds of messages, send message; Described message comprises administrative message and controls message.
5. method according to claim 4, is characterized in that, described administrative message and control message comprise respectively crucial message, inferior crucial message and common message, correspondingly, described according to predetermined, with the corresponding transmission priority of all kinds of messages, send message, specifically comprise:
Send successively the crucial message in administrative message, inferior crucial message and common message according to the order of video priority, audio priory level and the priority of doing one's best;
Send successively crucial message, inferior crucial message and the common message controlled in message according to the order of video priority, audio priory level and the priority of doing one's best.
6. a wireless network data dispensing device, is characterized in that, comprising:
Judge module, in the time that predetermined period arrives, judges in the buffer queue corresponding with target STA whether have newly-increased data message to be sent;
The first processing module, for judging the data message to be sent of knowing that existence is newly-increased, send described data message to be sent to described target STA, and continue to judge whether the BA structure that current and described target STA is corresponding meets destruction condition, if meet, send and delete instruction message to described target STA, to destroy described BA structure, and set up new BA structure with described target STA.
7. device according to claim 6, is characterized in that, described judge module comprises:
Acquiring unit, for obtaining the data message of the current institute of described buffer queue buffer memory and the first message number having sent datagram, and obtain the data message of previous predetermined period institute buffer memory in described buffer queue and the second message number having sent datagram;
Judging unit, for described the first message number is deducted to described the second message number, if difference is greater than zero, the data message to be sent that existence is newly-increased is known in judgement.
8. device according to claim 6, is characterized in that, described device also comprises:
The second processing module, knows and does not have newly-increased data message to be sent for judging, continues to maintain BA structure corresponding to described current and described target STA.
9. according to the device described in claim 6 to 8 any one, it is characterized in that, described device also comprises:
Sending module, for by packet filtering device, according to predetermined, with the corresponding transmission priority of all kinds of messages, send message; Described message comprises administrative message and controls message.
10. device according to claim 9, is characterized in that, described administrative message and control message comprise respectively crucial message, inferior crucial message and common message, correspondingly, described sending module specifically for:
Send successively the crucial message in described administrative message, inferior crucial message and common message according to the order of video priority, audio priory level and the priority of doing one's best;
Send successively the crucial message in described control message, inferior crucial message and common message according to the order of video priority, audio priory level and the priority of doing one's best.
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Address after: Cangshan District of Fuzhou City, Fujian province 350002 Jinshan Road No. 618 Garden State Industrial Park 19 floor Patentee after: RUIJIE NETWORKS Co.,Ltd. Address before: Cangshan District of Fuzhou City, Fujian province 350002 Jinshan Road No. 618 Garden State Industrial Park 19 floor Patentee before: Beijing Star-Net Ruijie Networks Co.,Ltd. |
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