CN102624483A - Method and device for data transmission - Google Patents
Method and device for data transmission Download PDFInfo
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- CN102624483A CN102624483A CN2012100536293A CN201210053629A CN102624483A CN 102624483 A CN102624483 A CN 102624483A CN 2012100536293 A CN2012100536293 A CN 2012100536293A CN 201210053629 A CN201210053629 A CN 201210053629A CN 102624483 A CN102624483 A CN 102624483A
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Abstract
The invention discloses a method and a device for data transmission, which relate to the technical field of communication. Power strength signals are used for representing transmission power used by other network devices by attenuating the obtained power strength signals; attenuated power strength signals are compared with a preset disturbance threshold; and when the attenuated power strength signals are smaller than the disturbance threshold, a data frame is sent. The method and the device for the data transmission can achieve that two and more than two devices on the same frequency channel can send the data frame simultaneously, improve channel use rate, and are mainly applied to wireless local area network technology.
Description
Technical field
The present invention relates to communication technical field, relate in particular to a kind of method and apparatus of transfer of data.
Background technology
Along with development of Communication Technique, WLAN (Wireless Local Area Network is called for short WLAN) technology develops growth rapidly, between a few years, grows into current mainstream technology.The WLAN technology is that medium carries out transfer of data through semiduplex mode with the air.
Under the half-duplex data-transmission mode; Equipment on the same frequency channels more than two; Access point (Access Point for example; Be called for short AP) or work station (Station) can't send Frame simultaneously, if on same frequency channels, there are at least two equipment sending Frame simultaneously, then every equipment all can receive the interference of other equipment sending data frames and can't Frame correctly be sent to corresponding receiving equipment.Prior art avoids through Carrier Sense Multiple Access/conflict that (Carrier Sense Multiple Access with Collision Avoidance, CSMA/CA) mechanism avoids having simultaneously on a certain frequency channels situation of two equipment sending datas.Concrete, a certain equipment needed other equipment of monitoring whether sending Frame before sending some Frames.Do not send if there are other equipment carrying out Frame, then directly send Frame; If there are other equipment sending Frame; Then this equipment accomplish Frame send the back wait for frame period and random back-off after the time once more monitoring whether also have other equipment carrying out Frame to send; When on channel, not having other equipment sending Frame, just Frame is sent.
In the practical application, distance is far away between some equipment, because the interference between the equipment that the transmission Frame causes is very little, can be similar to and ignores.Equipment still sends Frame according to existing send mode under this scene, causes data transmission efficiency low, the transfer resource of waste channel.
Summary of the invention
Embodiments of the invention provide a kind of method and apparatus of transfer of data, can on same frequency channels, allow a plurality of equipment to send Frame simultaneously, can improve the efficient of transfer of data, make full use of the transfer resource of channel.
On the one hand, the embodiment of the invention provides a kind of method of transfer of data, comprising:
Power level signal to obtaining is decayed, and said power level signal is used to characterize the transmitting power size that other network equipments use;
Power level signal after the decay and preset interference threshold value are compared;
When the power level signal after the said decay during, send Frame less than said interference threshold value.
On the other hand, the embodiment of the invention also provides a kind of equipment of transfer of data, comprises attenuator, comparator and transmitter, wherein,
Said attenuator is used for the power level signal that obtains is decayed, and said power level signal is used to characterize the transmitting power size that other equipment use;
Said comparator is used for the power level signal after the said attenuator decay is compared with preset interference threshold value;
Said transmitter is used for sending Frame when the power level signal after the decay of said attenuator during less than said interference threshold value.
The method and apparatus of the transfer of data that the embodiment of the invention provides; Can be before sending Frame; The power level signal of other equipment on the same frequency channels that obtains is decayed, and the power level signal of said other equipment is used to characterize the transmitting power size of other equipment sending data frames.If the power level signal after the decay then sends Frame less than preset interference threshold value.With the equipment distance is far away, mutual interference can be similar under the scene of ignoring mutually, allow multiple devices to send Frame simultaneously at equipment, can improve the efficient of transfer of data, make full use of the transfer resource of channel.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the method flow diagram of transfer of data in the embodiment of the invention;
Fig. 2 is the sketch map of transfer of data in the embodiment of the invention;
Fig. 3 is the method flow diagram of another transfer of data in the embodiment of the invention;
Fig. 4 is the sketch map of another transfer of data in the embodiment of the invention;
Fig. 5 is the method flow diagram of another transfer of data in the embodiment of the invention;
Fig. 6 is the structural representation of the equipment of transfer of data in the embodiment of the invention;
Fig. 7 is the structural representation of the equipment of another transfer of data in the embodiment of the invention;
Fig. 8 is the sketch map of another transfer of data in the embodiment of the invention.
Embodiment
To combine the accompanying drawing in the embodiment of the invention below, the technical scheme in the embodiment of the invention is carried out clear, intactly description, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
The embodiment of the invention provides a kind of method of transfer of data, and is as shown in Figure 1, and said method comprises the steps:
101, first equipment is decayed to the power level signal that obtains.
Said power level signal is used to characterize the size of the employed transmitting power of other equipment sending data frames.Said first equipment can be the network measurement equipment that comprises AP, also can be the terminal side equipment that comprises work station.
102, the power level signal after said first equipment will be decayed compares with preset interference threshold value.
When the power level signal after the decay during more than or equal to preset interference threshold value, first equipment thinks that other transmit leg equipment sending data frames can influence corresponding to the correct receiving data frames of the receiver equipment of first equipment, so do not send Frame.When the power level signal after the decay during less than preset interference threshold value, first equipment think other transmit leg equipment sending data frames can or approximate can the influence corresponding to the correct receiving data frames of the receiver equipment of first equipment, so send Frame.For example, as shown in Figure 2, equipment 1 communicates with equipment 3, and equipment 2 communicates with equipment 4.Equipment 1 need send Frame A to equipment 3 as first equipment, and this moment, equipment 2 sent Frame B to equipment 4.Equipment 1 uses same frequency channels to send Frame with equipment 2.Equipment 1 is decayed the power level signal that the equipment that obtains 2 sends Frame B.When the power level signal after the decay during more than or equal to preset interference threshold value, equipment 1 thinks that equipment 2 sends Frame B and can influence equipment 3 correct receiving data frames A, so do not send Frame.When the power level signal after the decay during less than preset interference threshold value, equipment 1 think equipment 2 send Frames can or the approximate equipment 3 correct receiving data frames A that can not influence, so the transmission Frame.
Need to prove, the said power level signal that obtains can be first equipment on port, get access to other equipment sending data frames the time employed transmitting power size.Said other equipment can be multiple devices, and first equipment is decayed to a plurality of power level signals on the port respectively, when the power level signal after all decay during all less than preset interference threshold value, and the first equipment sending data frame.
When 103, the power level signal after decaying is less than the interference threshold value, the said first equipment sending data frame.
Still as shown in Figure 2, the power level signal after comparative result is for decay is during less than the interference threshold value, and equipment 1 can send Frame A to equipment 3 on same frequency channels at equipment 2 when equipment 4 sends Frame B.For this frequency channels, this channel at a time can send Frame by two equipment simultaneously.Because equipment 3 is far away with equipment 2 distances; Equipment 2 sends Frame B and can ignore the influence of equipment 3 correct receiving data frames A; And in existing C SMA/CA mechanism; Even equipment 2 sends Frame B the influence of equipment 3 correct receiving data frames A is ignored, when equipment 4 sent Frame B, equipment 1 can not send Frame A to equipment 3 at equipment 2.Compare with current mechanism, the technical scheme that provides through this inventive embodiments is doubled the channel utilization of scene shown in Figure 2.When having 3,4,5 equipment to send Frame simultaneously on a certain frequency channels simultaneously, channel utilization is higher, and the transfer resource utilization is more abundant.
Need to prove; Equipment 1 does not send equipment 2 the actual emission power value reduction of Frame B among Fig. 2; But the power level signal that gets access on the port with equipment 1, be used for characterization device 2 transmitting powers size is decayed; Be on the angle of 1 pair of equipment 2 transmitting power of equipment sizes " cognition ", the decay that the transmission power level of equipment 2 is carried out.Far away for equipment 2 with the distance of equipment 3; Disturb almost insignificant scene; Equipment 1 can " think " that the interference of 2 pairs of equipment 1 of equipment is little of can be at equipment 2 when equipment 4 sends Frame B through the mode of relaxation equipment 2 power level signals; Send Frame A to equipment 3, and then improve channel utilization.
In embodiments of the present invention, owing to carry out interactive type communication between the equipment, so receiver equipment also can send Frame, this equipment is transmit leg equipment when sending Frame.For example equipment among Fig. 23 and equipment 4, the implementation to equipment 1 and equipment 2 transmission Frames is identical with the implementation of equipment 1 transmission Frame respectively as transmit leg equipment with equipment 4 for equipment 3, repeats no more here.
The method of the transfer of data that the embodiment of the invention provides; Can be before sending Frame; The power level signal of other equipment on the same frequency channels that obtains is decayed, and the power level signal of said other equipment is used to characterize the transmitting power size of other equipment sending data frames.If the power level signal after the decay then sends Frame less than preset interference threshold value.With the equipment distance is far away, mutual interference can be similar under the scene of ignoring mutually, allow multiple devices to send Frame simultaneously at equipment, can improve the efficient of transfer of data, make full use of the transfer resource of channel.
Further, the embodiment of the invention also provides a kind of method of transfer of data, and is as shown in Figure 3, and said method is that said method comprises to the further expanding of method shown in Figure 1:
301, first equipment is decayed to the power level signal that obtains.
Said power level signal is used to characterize the size of the employed transmitting power of other equipment sending data frames.Said first equipment can be the network measurement equipment that comprises AP, also can be the terminal side equipment that comprises work station.
In an application scenarios of the embodiment of the invention, owing to there is path loss, the power level signal of other equipment that first equipment obtains is less than the actual emission power size of other equipment.In embodiments of the present invention, said power level signal also can be used to characterize the transmitting power size through path loss.
Still as shown in Figure 2; The transmitting power that equipment 2 sends Frame B is 100 milliwatt (Milliwatt; Be called for short mW) because the effect of wireless channel path loss, the power level signal of the equipment 2 that obtains at a distance of the equipment 1 of certain distance is-75 decibels above milliwatts (decibels above 1 milliwatt; Be called for short dBm), convert milliwatt unit into and be about 0.000000032mW.Be convenience of calculation, the power level signal is dBm.
Said first equipment is decayed to the power level signal and is specially: first equipment is decayed to the power level signal according to preset signal attenuation value.Said signal attenuation value can be provided with according to the needs of practical application by the network manager, and the signal attenuation value is that example describes with 25dBm in the embodiment of the invention, in the practical application signal attenuation value is not limited.Still as shown in Figure 2; The transmitting power that equipment 2 sends Frame B is 20dBm; The power level signal of the equipment 2 that equipment 1 obtains is-75dBm, and equipment 1 according to preset signal attenuation value with the power level signal attenuation of equipment 2 is-100dBm, promptly-and 75dBm-25dBm=-100dBm.
302, the power level signal after said first equipment will be decayed compares with preset interference threshold value.
When the power level signal after the decay during more than or equal to preset interference threshold value, first equipment is thought has other equipment sending Frame on the channel, and its transmitting power can influence this equipment and correctly send Frame.When the power level signal after the decay during less than preset interference threshold value, first equipment is thought does not have other equipment sending Frame on the channel, so send Frame.Distance and transmission medium character are relevant between the setting of said interference threshold value and the transmitting power of other equipment, the equipment.For example; Transmitting power is not more than-80dBm greater than the interference threshold value of the equipment of 20dBm; The interference threshold value of the equipment of transmitting power between 17dBm and 20dBm can equal-76dBm, and the interference threshold value that transmitting power is less than or equal to the equipment of 17dBm can equal-70dBm.Distance is far away more between the equipment, and the path loss in equal transmission medium is just big more, so the interference threshold value is corresponding smaller.The embodiment of the invention that is provided with for the interference threshold value does not limit.
When 303, the power level signal after decaying is less than the interference threshold value, the said first equipment sending data frame.
For example, still as shown in Figure 2, equipment 1 communicates with equipment 3, and equipment 2 communicates with equipment 4.Equipment 1 need send Frame A to equipment 3 as first equipment, and this moment, equipment 2 sent Frame B to equipment 4.Equipment 1 uses same frequency channels to send Frame with equipment 2.The power level signal of the equipment 2 that records with equipment 1 for-75dBm, signal attenuation value be 25dBm, interference threshold value for-76dBm is an example: in existing CSMA/CA mechanism; Because the power level signal be-75dBm greater than the interference threshold value is-76dBm; So equipment 1 " thinks " that equipment 2 is sending Frame B; Cause producing each other disturbing for avoiding equipment 1 and equipment 2 on same channel, to send Frame simultaneously; Whether equipment 1 can send Frame B by waiting facilities 2, and after equipment 2 has sent Frame B, waits for a frame period and random back-off after the time in proper order again, have other equipment sending Frame once more in the supervisory channel; Wait for if having then continue, if not then send Frame A.In embodiments of the present invention; Equipment 1 with the power level signal attenuation of equipment 2 25dBm; Promptly decayed to-100dBm by original-75dBm, value-76dBm compares with interference threshold, and the power level signal after the decay is less than the interference threshold value; Equipment 1 " thinks " that equipment 2 is not sending Frame, and then equipment 1 can send Frame A.In fact, equipment 1 equipment 2 when sending Frame A is sending Frame B, and just equipment thinks that on the angle of " cognition " equipment 2 is not sending Frame B.Because equipment 3 and equipment 2 apart from each others among Fig. 2,, the transmitting power that equipment 2 sends Frame B ignores so can being similar to the interference of equipment 3 correct receiving data frames A.
Suppose to send Frame A and B respectively with 1ms (millisecond); Interframe is divided into 10ms; The random back-off time is minimum to be 2ms, and in CSMA/CA mechanism, sending Frame A and B needs 14ms (send Frame B1ms+ frame period 10ms+ random back-off time 2ms+ and send Frame B1ms).And in embodiments of the present invention, send Frame A and the minimum 1ms of needs of B (equipment 1 sends Frame simultaneously with equipment 2), need 2ms (equipment 1 sends Frame with equipment 2 orders) at most.Current mechanism has been saved 12ms at least relatively.
When 304, the power level signal after decaying was more than or equal to the interference threshold value, said first equipment was decayed to the power level signal after the decay once more.
In the Another application scene of the embodiment of the invention, first equipment can be decayed to the power level signal after decaying according to preset signal attenuation value once more.The embodiment of the invention does not limit the signal attenuation value.Concrete; Still as shown in Figure 2; With the power level signal of equipment 2 for-55dBm, signal attenuation value be 10dBm, interference threshold value for-76dBm is an example: after equipment 1 was decayed the power level signal of equipment 2 according to the signal attenuation value, the power level signal after the decay was-65dBm is still greater than the interference threshold value.This moment, equipment 1 was decayed the power level signal-75dBm after being decayed once more according to the signal attenuation value to the power level signal after decaying once more.Repeated execution of steps 302 then; Power level signal after decaying is once more compared with preset interference threshold value, and less than the interference threshold value of presetting, then equipment 1 sends Frame A as if the power level signal after decaying once more; If the power level signal after the decay is still more than or equal to preset interference threshold value once more; Then equipment 1 repeated execution of steps 304 and step 302, up to power level signal attenuation till less than the interference threshold value, send Frame A then.Should use in the scene, equipment 1 repeats step 304 and step 302 2 times, and power level signal attenuation to-85dBm, less than interference threshold value-76dBm, is sent Frame A then.
Further, in another application scenarios of the embodiment of the invention, can also monitor the packet loss of the first equipment sending data frame, said packet loss is the ratio that the obliterated data number of frames accounts for transferring data frames quantity in the data frame transfer.When packet loss during, show that other equipment that sending Frame can exert an influence to the correct receiving data frames of the receiver equipment of said first equipment on the same frequency channels more than or equal to preset packet loss threshold value.As shown in Figure 4, equipment 1 needs to send continuously A and two Frames of B when equipment 2 sends Frame C, after having sent Frame A, and the packet loss of Monitoring Data frame A.
If the packet loss of Frame A is less than or equal to the packet loss threshold value, then equipment 1 can be decayed according to the power level signal that original signal attenuation value is obtained when sending Frame B.
If the packet loss of Frame A is greater than the packet loss threshold value, for example greater than 10%, then equipment 1 is when sending Frame B, and as shown in Figure 5, needs are carried out following steps:
501, first equipment reduces the signal attenuation value.
The said signal attenuation value that reduces can realize through following dual mode:
1) the signal attenuation value is reduced by half, form new signal attenuation value.For example reduce by half to 5dBm, reduce attenuation degree thus by 10dBm.
2) said preset signal attenuation value is deducted preset signal attenuation stepping, form new signal attenuation value.For example the original signal pad value is 10dBm, and preset signal attenuation stepping is 2dBm, and the signal attenuation value of using original signal pad value subtraction signal decay stepping to make new advances is 8dBm.
Optional, when the packet loss of Frame A during more than or equal to the packet loss threshold value, can also be not power level signal when sending Frame B decay.
502, said first equipment is decayed to the power level signal that obtains once more with the signal attenuation value after reducing.
503, said first monitoring of equipment sends the packet loss of Frame once more.
If the packet loss of Frame B is during greater than the packet loss threshold value, repeated execution of steps 501 promptly according to two kinds of implementations that reduce the signal attenuation value in the step 501, reduces the signal attenuation value once more.
Need to prove; Reduce to the attenuation degree of Frame B or not the power level signal when sending Frame B decay; Power level signal when not guaranteeing to send Frame B is necessarily more than or equal to the interference threshold value; But reduce or not the power level signal when sending Frame B decay so that this power level signal levels off to more than or equal to the interference threshold value.Whether whether send Frame B according to the power level signal and then be the implementation of prior art less than the decision of interference threshold value; Promptly according to existing C SMA/CA mechanism; If the power level signal when sending Frame B is less than the interference threshold value; Show that then equipment 2 is not sending Frame C, this moment, equipment 1 can send Frame B; If the power level signal when sending Frame B shows then that more than or equal to the interference threshold value equipment 2 is sending Frame C, this moment, equipment 1 did not send Frame B.
Further optional; The packet loss that sends Frame A when equipment 1 is during more than or equal to the packet loss threshold value; Can also resend Frame A, the said Frame A that resends can be with reference to the implementation of above-mentioned transmission Frame B, and the embodiment of the invention repeats no more to this.
The parameter that can be used for the correct receiving data frames of characterization device in the embodiment of the invention is not limited to packet loss.Be used for the parameter of the correct receiving data frames of characterization device for other, its implementation repeats no more with the implementation during as parameter is identical with packet loss here in the lump.
The method of the transfer of data that the embodiment of the invention provides; Before sending Frame; The power level signal of other equipment on the same frequency channels that obtains is decayed, and the power level signal of said other equipment is used to characterize the transmitting power size of other equipment sending data frames.If the power level signal after the decay then sends Frame less than preset interference threshold value.With the equipment distance is far away, mutual interference can be similar under the scene of ignoring mutually, allow multiple devices to send Frame simultaneously at equipment, can improve the efficient of transfer of data, make full use of the transfer resource of channel.
In addition; The method of the transfer of data that the embodiment of the invention provides; Can also monitor the packet loss that sends Frame, when packet loss greater than can guarantee the boundary value of correct transmission Frame the time, in the process of follow-up transmission Frame; Reduce or not to power level signal attenuation, so that preferentially guarantee the transmission success rate of Frame.
Referring to Fig. 6, be the equipment of a kind of transfer of data of providing of the embodiment of the invention, in order to realize Fig. 1 of the present invention and method shown in Figure 3.Said equipment 60 can be the network measurement equipment that comprises AP, also can be the terminal side equipment that comprises work station.As shown in Figure 6, said equipment 60 comprises attenuator 61, comparator 62 and transmitter 63, wherein,
Said attenuator 61 is used for the power level signal that obtains is decayed, and said power level signal is used to characterize the transmitting power size that other equipment use.
Said comparator 62 is used for the power level signal after said attenuator 61 decay is compared with preset interference threshold value.
When the power level signal after 61 decay of said attenuator during more than or equal to preset interference threshold value, can think has other equipment sending Frame on the channel, and its transmitting power can influence the said equipment 60 correct Frames that send.When the power level signal after 61 decay of said attenuator during less than preset interference threshold value, can think does not have other equipment sending Frame on the channel, and said equipment 60 can send Frame.Distance and transmission medium character are relevant between the setting of said interference threshold value and the transmitting power of other equipment, the equipment.For example; Transmitting power is not more than-80dBm greater than the interference threshold value of the equipment of 20dBm; The interference threshold value of the equipment of transmitting power between 17dBm and 20dBm can equal-76dBm, and the interference threshold value that transmitting power is less than or equal to the equipment of 17dBm can equal-70dBm.Distance is far away more between the equipment, and the path loss in equal transmission medium is just big more, so the interference threshold value is corresponding smaller.The embodiment of the invention that is provided with for the interference threshold value does not limit.
Said transmitter 63 is used for sending Frame when the power level signal after 61 decay of said attenuator during less than said interference threshold value.
Further, said attenuator 61 specifically is used for according to preset signal attenuation value said power level signal being decayed.
Said signal attenuation value can be provided with according to the needs of practical application by the network manager, and the signal attenuation value is that example describes with 25dBm in the embodiment of the invention, in the practical application signal attenuation value is not limited.
Further, when the power level signal after 61 decay of said attenuator during more than or equal to said interference threshold value, said attenuator 61 also is used for decaying once more according to the power level signal of said preset signal attenuation value after to said decay.
Correspondingly, power level signal and said interference threshold value after said comparator 62 also is used for said attenuator 61 decayed once more compare.
When said transmitter 63 also is used for power level signal after said attenuator 61 is decayed once more less than said interference threshold value, send Frame.
Further, as shown in Figure 7, said equipment 60 can also comprise monitor 71 and processor 72, is used to the method that realizes that the present invention is shown in Figure 5.
Said monitor 71 is used to monitor the packet loss that said transmitter 63 sends said Frame.
Said packet loss is the ratio that the obliterated data number of frames accounts for transferring data frames quantity in the data frame transfer.When packet loss during, show on the same frequency channels can exert an influence to the correct receiving data frames of the receiver equipment of said equipment 60 by a plurality of equipment transmission data frames simultaneously more than or equal to preset packet loss threshold value.
When the packet loss of said monitor 71 monitorings during more than or equal to preset packet loss threshold value:
Said processor 72 is used for said preset signal attenuation value is reduced by half, and is for example reduced by half to 5dBm by 10dBm, forms new signal attenuation value; Perhaps, be used for said preset signal attenuation value is deducted preset signal attenuation stepping, for example the original signal pad value is 10dBm, and preset signal attenuation stepping is 2dBm, forms new signal attenuation value.
Need to prove; Said processor 72 reduce the attenuation degree of Frame B or the power level signal when the power level signal when sending Frame B does not guarantee to send Frame B necessarily more than or equal to the interference threshold value; But reduce or not the power level signal when sending Frame B decay so that this power level signal levels off to more than or equal to the interference threshold value.Whether whether send Frame B according to the power level signal and then be the implementation of prior art less than the decision of interference threshold value.
Further, can also comprise the radio frequency link device in the said equipment, said radio frequency link device is used to obtain the power level signal of other equipment.Said radio frequency link device can link to each other with said attenuator 61.
Perhaps, said radio frequency receives chain circuit device and also can comprise said attenuator 61, said comparator 62 and said transmitter 63.
The equipment of the transfer of data that the embodiment of the invention provides; Include but are not limited to access node (the Access Point among the WLAN WLAN; AP) and work station (Station); The device or the equipment that have the wireless data sending function in other application scenarioss belong to the described equipment of the embodiment of the invention equally, enumerate no longer one by one here.The equipment of the described transfer of data of the embodiment of the invention has sending function and receiving function among the method embodiment simultaneously in addition, in order to guarantee can to carry out interactive type communication between the equipment in the practical application.
In an application scenarios of the embodiment of the invention, AP and Station carry out wireless data under semiduplex mode mutual, and AP and Station can be as sending Frame, and when one of which side during as transmit leg equipment, the opposing party is as receiver equipment.As shown in Figure 8, AP1 can only carry out data interaction with Station1, and AP2 can only carry out data interaction with Station2, and AP1, Station1, AP2 and Station2 are mutual at the enterprising line data of same frequency channels.When AP1 when Station1 sends Frame A because AP1 is far away with the Station2 distance, the interference that the transmitting power of AP1 receives AP2 transmission Frame B to Station2 can be similar to be ignored.So though the power level signal of the AP1 of AP2 acquisition this moment is higher than the interference threshold value; But AP2 can be with the power level signal attenuation of AP1 to less than the interference threshold value; Thereby when AP1 sends Frame A; AP2 can send Frame B to Station2, can realize thus on the same frequency channels that two and above equipment send Frame simultaneously, have saved Internet resources.Station is identical with the mode that AP sends Frame as transmit leg equipment sends implementation from Frame to AP, repeats no more here.
The method and apparatus of the transfer of data that the embodiment of the invention provides goes for various communication systems; These systems comprise: WCDMA (Wideband Code Division Multiple Access; Abbreviation WCDMA) system, Long Term Evolution (Long Term Evolution; Abbreviation LTE) system, global mobile communication (Global System for Mobile Communications is called for short GSM) system etc.
The technical scheme that adopts the embodiment of the invention to provide can decay the power level signal of other equipment on the same frequency channels that obtains before sending Frame.If the power level signal after the decay then sends Frame less than preset interference threshold value.In that equipment and equipment distance is far away, mutual interference can be similar under the scene of ignoring mutually, allow multiple devices to send Frame simultaneously like this, can improve the efficient of transfer of data, make full use of the transfer resource of channel.Simultaneously, send the packet loss of Frame through monitoring, when packet loss greater than can guarantee the boundary value of correct transmission Frame the time, in the process of follow-up transmission Frame, reduce or, can guarantee the transmission success rate of Frame not to power level signal attenuation.
Through the description of above execution mode, the those skilled in the art can be well understood to the present invention and can realize by the mode that software adds essential common hardware, can certainly pass through hardware, but the former is better execution mode under a lot of situation.Based on such understanding; The part that technical scheme of the present invention contributes to prior art in essence in other words can be come out with the embodied of software product, and this computer software product is stored in the storage medium that can read, like the floppy disk of computer; Hard disk or CD etc.; Comprise some instructions with so that computer equipment (can be personal computer, server, perhaps equipment etc.) carry out the described method of each embodiment of the present invention.
The above; Be merely embodiment of the present invention, but protection scope of the present invention is not limited thereto, any technical staff who is familiar with the present technique field is in the technical scope that the present invention discloses; Can expect easily changing or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion by said protection range with claim.
Claims (8)
1. the method for a transfer of data is characterized in that, comprising:
Power level signal to obtaining is decayed, and said power level signal is used to characterize the transmitting power size that other network equipments use;
Power level signal after the decay and preset interference threshold value are compared;
When the power level signal after the said decay during, send Frame less than said interference threshold value.
2. method according to claim 1 is characterized in that, said the power level signal is decayed, and specifically comprises:
Signal attenuation value according to preset decays to said power level signal.
3. method according to claim 2 is characterized in that, said method also comprises: when the power level signal after the said decay during more than or equal to said interference threshold value,
Decay once more according to the power level signal of said preset signal attenuation value after to said decay;
Power level signal and said interference threshold value after decaying are once more compared;
When the power level signal after the said decay once more during, send Frame less than said interference threshold value.
4. according to claim 2 or 3 described methods, it is characterized in that after said transmission Frame, said method also comprises:
The packet loss of said Frame is sent in monitoring;
When said packet loss during more than or equal to preset packet loss threshold value, said preset signal attenuation value is reduced by half, form new signal attenuation value; Perhaps,
Said preset signal attenuation value is deducted preset signal attenuation stepping, form new signal attenuation value.
5. the equipment of a transfer of data is characterized in that, comprises attenuator, comparator and transmitter, wherein,
Said attenuator is used for the power level signal that obtains is decayed, and said power level signal is used to characterize the transmitting power size that other equipment use;
Said comparator is used for the power level signal after the said attenuator decay is compared with preset interference threshold value;
Said transmitter is used for sending Frame when the power level signal after the decay of said attenuator during less than said interference threshold value.
6. equipment according to claim 5 is characterized in that, said attenuator specifically is used for according to preset signal attenuation value said power level signal being decayed.
7. equipment according to claim 6; It is characterized in that; When the power level signal after the said decay during more than or equal to said interference threshold value, said attenuator also is used for decaying once more according to the power level signal of said preset signal attenuation value after to said decay;
Power level signal and said interference threshold value after said comparator also is used for said attenuator decayed once more compare;
When said transmitter also is used for power level signal after said attenuator is decayed once more less than said interference threshold value, send Frame.
8. according to claim 6 or 7 described equipment, it is characterized in that said equipment also comprises:
Monitor is used to monitor the packet loss that said transmitter sends said Frame;
Processor is used for when the packet loss of said monitor monitors during more than or equal to preset packet loss threshold value,
Said preset signal attenuation value is reduced by half, form new signal attenuation value;
Perhaps, said preset signal attenuation value is deducted preset signal attenuation stepping, form new signal attenuation value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210053629.3A CN102624483B (en) | 2012-03-02 | 2012-03-02 | Method and device for data transmission |
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