CN103297191A - Data acquisition method for automatically adjusting wireless transmission rate and data acquisition system - Google Patents
Data acquisition method for automatically adjusting wireless transmission rate and data acquisition system Download PDFInfo
- Publication number
- CN103297191A CN103297191A CN2013101914369A CN201310191436A CN103297191A CN 103297191 A CN103297191 A CN 103297191A CN 2013101914369 A CN2013101914369 A CN 2013101914369A CN 201310191436 A CN201310191436 A CN 201310191436A CN 103297191 A CN103297191 A CN 103297191A
- Authority
- CN
- China
- Prior art keywords
- signal
- noise ratio
- wireless transmission
- transmission channel
- bandwidth
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Mobile Radio Communication Systems (AREA)
Abstract
本发明提供一种自动调节无线传输速率的数据采集方法及数据采集系统，其中，所述方法包括：获取传输采集数据的无线传输信道当前的带宽；根据所述无线传输信道当前的带宽及为用于数据采集的一个或多个数据采集器分别配置的带宽比重获取每个数据采集器的最大采集速率；根据每个数据采集器的最大采集速率调整通过所述无线传输信道对每个数据采集器的采集数据的发送。本发明通过对无线传输信道中信噪比的监测，以确定当前的信道带宽，从而根据当前信道的带宽，调整数据采集器的采集速率以适应当前的信道质量及带宽。
The present invention provides a data collection method and a data collection system for automatically adjusting wireless transmission rates, wherein the method includes: obtaining the current bandwidth of a wireless transmission channel for transmitting and collecting data; According to the bandwidth proportion of one or more data collectors configured respectively for data collection, the maximum collection rate of each data collector is obtained; according to the maximum collection rate of each data collector, the wireless transmission channel is adjusted to each data collector Sending of collected data. The present invention determines the current channel bandwidth by monitoring the signal-to-noise ratio in the wireless transmission channel, thereby adjusting the collection rate of the data collector to adapt to the current channel quality and bandwidth according to the current channel bandwidth.
Description
Technical field
The present invention relates to communication field, relate in particular to a kind of collecting method and data acquisition system of automatic adjusting wireless transmission rate.
Background technology
Along with the development of information technology, network has become people's daily life and part of work, and therefore, people are also more and more to the demand of network peripheral hardware, for example, and various video camera apparatus, speech ciphering equipment etc.At present, the application of network shooting equipment is very extensive, and the various view data that will photograph by picture pick-up device or the various video datas of recording are given other-end by network delivery, bring great convenience to the user, and well the user experiences.
Network shooting equipment can communicate by wired mode and other equipment, also can communicate by wireless mode and other equipment.For existing wire communication, bandwidth is generally more stable, and can guarantee the normal transmission of real-time video or the image of better quality, and for radio communication, there is fluctuation in quality of wireless channel, when worsening appears in quality of wireless channel, can't guarantee that the video of equipment real-time Transmission or image transmit with initial quality.And, very likely occur causing owing to the transmission rate of equipment is higher entire wireless communication system for the moment flow amass and increase, even cause the situation of the collapse of whole Radio Link.
At present, some camera head comprises the function of automatic adjusting transmission rate, but normally weighs the quality of link quality with packet loss, the transmission rate of equipment is adjusted accordingly again.But packet loss can not reflect the real conditions of data transmission link sometimes completely, because cause the reason of packet loss, may be not only because the decline of link quality also might be the influence that is subjected to factors such as data-handling capacity.
Summary of the invention
Main purpose of the present invention is to provide a kind of collecting method and data acquisition system of automatic adjusting wireless transmission rate, with solve the transmission rate owing to equipment that prior art exists higher cause entire wireless communication system for the moment flow amass and increase, even may cause the problem of the collapse of whole Radio Link.
The collecting method of automatic adjusting wireless transmission rate provided by the invention comprises: the current bandwidth of wireless transmission channel of obtaining the transmission image data; Reach the bandwidth ratio that disposes respectively for the one or more data acquisition units that are used for data acquisition according to the current bandwidth of described wireless transmission channel and recapture the maximum acquisition rate of getting each data acquisition unit; According to the maximum acquisition rate adjustment of each data acquisition unit by the transmission of described wireless transmission channel to the image data of each data acquisition unit.
Further, obtain the current bandwidth of described wireless transmission channel, comprising: the signal to noise ratio interval of configuration wireless transmission channel and the corresponding relation of bandwidth; The signal to noise ratio of wireless transmission channel to the transmission image data is monitored, and detects corresponding signal to noise ratio interval according to described signal to noise ratio, obtains the current bandwidth of described wireless transmission channel in conjunction with the interval corresponding relation with bandwidth of described signal to noise ratio again.
Further, the signal to noise ratio interval of configuration wireless transmission channel and the corresponding relation of bandwidth, comprise: by system testing obtain described wireless transmission channel the one or more signal to noise ratios under the different channels quality and corresponding adaptive in described wireless transmission channel the modulation coding mode of transmission signal, thereby obtain the corresponding relation of the interval and adaptive modulation coding mode of different signal to noise ratios; Obtain the bandwidth of the described wireless transmission channel that adapts according to each modulation coding mode, thereby set up the corresponding relation of the bandwidth of the interval and adaptive modulation coding mode of different signal to noise ratios and described wireless transmission channel.
Further, the signal to noise ratio of wireless transmission channel to the transmission image data is monitored, detect corresponding signal to noise ratio interval according to described signal to noise ratio, obtain the current bandwidth of described wireless transmission channel in conjunction with the interval corresponding relation with bandwidth of described signal to noise ratio again, comprise: in real time or the signal to noise ratio of the described wireless transmission channel of cycle monitoring, and judge that the signal to noise ratio that monitors is whether in the corresponding signal to noise ratio of the modulation coding mode of current use interval; When the described signal to noise ratio that monitors not when the corresponding signal to noise ratio of the modulation coding mode of current use is interval, current modulation coding mode is changed to the interval corresponding modulation coding mode of the residing signal to noise ratio of described signal to noise ratio, and the bandwidth of the described wireless transmission channel that acquisition adapts according to the modulation coding mode after the change.
Further, carry the rate adaptation message of described maximum acquisition rate to each data acquisition unit transmission, thereby make described data acquisition unit regulate the maximum acquisition rate that sends corresponding image data according to described rate adaptation message.
For addressing the above problem, the present invention also provides a kind of wireless transmitter, be connected with one or more data acquisition units, comprise: wireless sending module, the image data that each data acquisition unit that is used for receiving is sent sends by wireless transmission channel according to the corresponding maximum acquisition rate of each data acquisition unit; The channel quality monitoring means is used for obtaining the current bandwidth of described wireless transmission channel; The transmission rate control unit, be used for reaching the bandwidth ratio that disposes respectively for described one or more data acquisition units according to the current bandwidth of described wireless transmission channel and recapture the maximum acquisition rate of getting each data acquisition unit, and described maximum acquisition rate is sent to corresponding data acquisition unit so that corresponding data acquisition unit adjustment sends the maximum acquisition rate of described image data separately to described wireless sending module.
Further, described channel quality monitoring means is further used for: the signal to noise ratio interval of configuration wireless transmission channel and the corresponding relation of bandwidth; The signal to noise ratio of wireless transmission channel to the transmission image data is monitored, and detects corresponding signal to noise ratio interval according to described signal to noise ratio, obtains the current bandwidth of described wireless transmission channel in conjunction with the interval corresponding relation with bandwidth of described signal to noise ratio again.
Further, described channel quality monitoring means, be further used for: by system testing obtain described wireless transmission channel the one or more signal to noise ratios under the different channels quality and corresponding adaptive in described wireless transmission channel the modulation coding mode of transmission signal, thereby obtain the corresponding relation of the interval and adaptive modulation coding mode of different signal to noise ratios; Obtain the bandwidth of the described wireless transmission channel that adapts according to each modulation coding mode, thereby set up the corresponding relation of the bandwidth of the interval and adaptive modulation coding mode of different signal to noise ratios and described wireless transmission channel.
Further, described channel quality monitoring means is further used for: in real time or the signal to noise ratio of the described wireless transmission channel of cycle monitoring, and judge that the signal to noise ratio that monitors is whether in the corresponding signal to noise ratio of the modulation coding mode of current use interval; When the described signal to noise ratio that monitors not when the corresponding signal to noise ratio of the modulation coding mode of current use is interval, current modulation coding mode is changed to the interval corresponding modulation coding mode of the residing signal to noise ratio of described signal to noise ratio, and the bandwidth of the described wireless transmission channel that acquisition adapts according to the modulation coding mode after the change.
Further, described transmission rate control unit is further used for: send to each data acquisition unit and carry the rate adaptation message of described maximum acquisition rate, adjustment sends the maximum acquisition rate of corresponding image data according to described rate adaptation message thereby make described data acquisition unit.
For addressing the above problem, the present invention also provides a kind of data acquisition system, comprise: aforesaid wireless transmitter and the one or more data acquisition units that are connected with described wireless transmitter respectively, wherein, described data acquisition unit, further comprise: data transmission unit is used for the acquisition image data and is transferred to described wireless transmitter sending; And transmission rate adjustment unit, be used for to receive the rate adaptation message that the transmission rate control unit of described wireless transmitter sends, and be set to the maximum acquisition rate that carries in the described rate adaptation message according to the maximum acquisition rate of the described data transmission unit of described rate adaptation message.
Compared with prior art, the technique effect that obtains of the present invention:
(1) by real-time or the current signal to noise ratio of cycle monitoring wireless transmission channel, whether the current signal to noise ratio of determining described wireless transmission channel is suitable with current modulation coding mode, thereby can adjust modulation coding mode in the wireless transmission channel according to current signal to noise ratio, with adaptive channel quality preferably.
(2) modulation coding mode in the signal to noise ratio adjustment wireless transmission channel that basis is real-time or cycle monitoring obtains is to determine current channel width, thereby can be according to current channel width, adjust the acquisition rate of data acquisition unit, to adapt to current channel quality and bandwidth, the too high channel quality of speed is lower when avoiding the transmission because of one or more equipment, and a certain moment data are increased sharply even the phenomenon of collapse in the wireless transmission channel that causes.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used for explaining the present invention, do not constitute improper restriction of the present invention.In the accompanying drawings:
Fig. 1 is the flow chart of the collecting method of the automatic adjusting wireless transmission rate that the present invention relates to;
Fig. 2 is the flow chart of one embodiment of the invention;
Fig. 3 is the schematic diagram of wireless transmitter of the present invention;
Fig. 4 is the schematic diagram of data acquisition system of the present invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, below in conjunction with drawings and the specific embodiments, the present invention is described in further detail.
Main thought of the present invention is, monitor in real time by the signal to noise ratio to wireless transmission channel, obtain the current bandwidth of described wireless channel, thereby determine that the one or more data acquisition units in the described wireless transmission channel transmit the maximum acquisition rate of image data in described wireless transmission channel, and adjust the maximum acquisition rate of described data acquisition unit, thereby can make each data acquisition unit with more rational transmission rate transmission image data.Described acquisition rate refers to data acquisition unit to the speed of wireless transmitter transmission image data, and the image data that described wireless transmitter can be sent data acquisition unit sends by wireless transmission channel.
As shown in Figure 1, method of the present invention comprises: step S1, obtain the current bandwidth of wireless transmission channel of transmitting image data; Step S2 reaches the bandwidth ratio that disposes respectively for the one or more data acquisition units that are used for data acquisition according to the current bandwidth of described wireless transmission channel and recaptures the maximum acquisition rate of getting each data acquisition unit; Step S3, according to the maximum acquisition rate adjustment of each data acquisition unit by the transmission of described wireless transmission channel to the image data of each data acquisition unit.
Below come method of the present invention is elaborated with an embodiment, in the present embodiment, the corresponding step S1 of step S101-S107, the corresponding step S2 of step S108, the corresponding step S3 of step S109, as shown in Figure 1, the step of this embodiment comprises:
Step S101 obtains the corresponding relation of the interval and adaptive modulation coding mode of the different signal to noise ratio of described wireless transmission channel by system testing.
In the wireless transmission channel, for certain given signal to noise ratio, can mate the interval corresponding optimal modulation coding mode of the residing signal to noise ratio of this signal to noise ratio for it, also can think, different modulation coding modes accommodates different signal to noise ratio intervals, this corresponding relation depends on system performance, and the interval corresponding optimal modulation coding mode of signal to noise ratio is not necessarily identical in the different systems.Therefore, can obtain in the current wireless transmission system by system testing, described wireless transmission channel the one or more signal to noise ratios under the different channels quality and corresponding adaptive in described wireless transmission channel the modulation coding mode of transmission signal, thereby obtain the corresponding relation of the interval and adaptive modulation coding mode of different signal to noise ratios; Wherein, system testing refers to by radio frequency testing and the test the current wireless communication system carried out in conjunction with the physical layer simulation algorithm, obtain wireless transmission channel at the one or more signal to noise ratios under the different channels quality and the corresponding adaptive modulation coding mode that in described wireless transmission channel, transmits signal thereof, thereby, obtain the corresponding relation of the interval and adaptive modulation coding mode of different signal to noise ratio.
Step S102 obtains the bandwidth of the described wireless transmission channel that adapts according to each modulation coding mode.
Modulation coding mode and the bandwidth of channel also are corresponding relations in the wireless transmission channel, and corresponding relation depends on each system performance, and in same system, various coded systems have its fixing corresponding channel width.Therefore, can obtain the bandwidth of the described wireless transmission channel that adapts according to each modulation coding mode.
Step S103 sets up the corresponding relation of the bandwidth of the interval and adaptive modulation coding mode of different signal to noise ratio and described wireless transmission channel.
By step S101-S102 obtain signal to noise ratio in the wireless transmission channel interval with wireless transmission channel in the corresponding relation of modulation coding mode and the corresponding relation of modulation coding mode and channel width, just can obtain the indirect corresponding relation of signal to noise ratio and bandwidth in the wireless transmission channel, for example, table 1 is the interval mapping table with modulation coding mode and channel width of signal to noise ratio in a certain wireless transmitting system, the signal to noise ratio interval of part modulation coding mode correspondence and the corresponding relation of channel width have only been listed in the table, and, in the mapping table below, the corresponding relation of the numerical value of the numerical value interval of signal to noise ratio and the corresponding relation of modulation coding mode and modulation coding mode and bandwidth, for what obtain under same system, this corresponding relation is different because of the difference of system.
| Signal to noise ratio (dB) | Modulation coding mode | Bandwidth (Mbps) |
| 0-5 | BPSK1/2 | 6.67 |
| 5-7 | BPSK3/4 | 10.00 |
| 7-10 | QPSK1/2 | 13.34 |
| 10-13 | QPSK3/4 | 20.01 |
| 13-15 | 16QAM1/2 | 26.68 |
| 15-～ | 16QAM3/4 | 40.02 |
Table 1
Step S104, the real-time or current signal to noise ratio of the described wireless transmission channel of cycle monitoring.
In wireless transmission, often there is fluctuation in channel quality, and the signal to noise ratio in the channel also can change constantly, therefore, carries out real-time or periodically monitoring to signal to noise ratio, in order to obtain real-time channel quality or interior channel quality of a period of time in the channel.
Signal to noise ratio is monitored in real time, is exactly the numerical value that obtains current signal to noise ratio in real time, and in step S105, judges whether the numerical value of the current signal to noise ratio that real-time monitors is in the corresponding signal to noise ratio of the modulation coding mode interval of current use.For example, be 3dB when monitoring obtains current real-time signal to noise ratio, then in step S105, judge whether current signal to noise ratio 3dB is in the corresponding signal to noise ratio of the modulation coding mode interval of current use.
Signal to noise ratio is periodically monitored, in simple terms, can be divided into monitoring and two processes of filtering, in the observation process, in monitoring periods, every the scheduled time, signal to noise ratio to channel is once monitored, obtain the true signal to noise ratio of current time, described monitoring periods can be set as the case may be, for example is set at 1 second, 5 seconds etc.In filtering, the true signal to noise ratio that the calculating signal to noise ratio that the last time is calculated and this monitoring obtain, according to predetermined proportion addition, the numerical value that obtains is as this calculating signal to noise ratio; The calculating signal to noise ratio that this cycle is calculated for the last time is as the signal to noise ratio of current monitoring periods.Above-mentioned observation process and filtering can carry out synchronously, that is, whenever once monitor, and just once calculate; After also can finishing at the observation process of one-period, carry out filtering again.
In the filtering, by formula (1) calculates the calculating signal to noise ratio of this monitoring;
SNR′(t)=a×SNR(t)+(1-a)×SNR′(t-Δt) （1）
Wherein, Δ t represents that each Δ t time once monitors; SNR (t) expression current time t, the true signal to noise ratio that monitoring obtains; SNR ' (t) represents the calculating signal to noise ratio of the current time t that calculates; SNR ' (t-Δ t)) the calculating signal to noise ratio in the expression moment (t-Δ t), that is, during last the monitoring, the calculating signal to noise ratio that calculates; A represents current time t, and the true signal to noise ratio that this monitoring obtains is shared proportion in the calculating signal to noise ratio of current time; (1-a) calculating signal to noise ratio snr ' (the t-Δ t) that calculate of expression previous moment (t-Δ t) shared proportion in the calculating signal to noise ratio snr of current time t ' (t);
Give one example below and describe:
Suppose with 5 seconds be a monitoring periods, carried out the monitoring of a signal to noise ratio every 1 second, a value is made as 0.9, and obtains according to formula (1):
Monitoring during 1s and obtaining true signal to noise ratio is 1dB, corresponding calculating signal to noise ratio snr '=1 * 0.9+0 * 0.1=0.9dB
Monitoring during 2s and obtaining true signal to noise ratio is 2dB, corresponding calculating signal to noise ratio snr '=2 * 0.9+0.9 * 0.1=1.89dB;
Monitoring during 3s and obtaining true signal to noise ratio is 3dB, corresponding calculating signal to noise ratio snr '=3 * 0.9+1.89 * 0.1=2.889dB;
Monitoring during 4s and obtaining true signal to noise ratio is 1dB, corresponding calculating signal to noise ratio snr '=1 * 0.9+2.889 * 0.1=1.1889dB;
Monitoring during 5s and obtaining true signal to noise ratio is 2dB, corresponding calculating signal to noise ratio snr '=2 * 0.9+1.1889 * 0.1=1.91889dB;
Therefore, the calculating signal to noise ratio 1.91889dB of correspondence is as the signal to noise ratio of current period during with 5s, just in step S105, whether the calculating signal to noise ratio that obtains when judging 5S is in the signal to noise ratio in the corresponding signal to noise ratio of the modulation coding mode interval of current use.
After judging whether to change modulation coding mode, proceed the calculating of following one-period.In the calculating of following one-period, will not go up the calculating snr value zero clearing that last moment one-period calculates, but be then used in the calculating of following one-period.For example, when then calculating the calculating signal to noise ratio of next monitoring periods, then will go up the signal to noise ratio (the calculating signal to noise ratio during 5S) of one-period, as the calculating signal to noise ratio in a last moment, directly carry out calculating next time.
Step S105 judges that the signal to noise ratio monitor is whether in the corresponding signal to noise ratio of the modulation coding mode of current use interval.
The signal to noise ratio that obtains according to step S101-S103 interval with the modulation coding mode that is fit to corresponding relation and with the corresponding relation of bandwidth, judge the real-time signal to noise ratio that in step 104, obtains or periodically the signal to noise ratio of the current period that obtains of monitoring whether be in the corresponding signal to noise ratio of the modulation coding mode interval of current use.If described signal to noise ratio is in the corresponding signal to noise ratio of the current modulation coding mode interval, then do not need to change current modulation coding mode, can turn back to step S104, the real-time or current signal to noise ratio of the described wireless transmission channel of cycle monitoring.
And if current signal to noise ratio is then carried out step S106 not in the corresponding signal to noise ratio of current modulation coding mode interval, current modulation coding mode is changed to the interval corresponding modulation coding mode of the residing signal to noise ratio of described signal to noise ratio.
For example, when the current signal to noise ratio of real-time monitoring, a certain moment t, the signal to noise ratio that monitors is 6dB, searches the corresponding relation of signal to noise ratio interval and modulation coding mode from table 1, signal to noise ratio is the interval 5-7dB of being of the corresponding signal to noise ratio of 6dB, the interval corresponding modulation coding mode of this signal to noise ratio is BPSK3/4, and current modulation coding mode is BPSK3/4, and then the modulation coding mode of system does not need change, be BPSK3/4 still, return and continue execution in step S104; If a certain moment t, the signal to noise ratio that monitors channel is 8dB, corresponding signal to noise ratio interval is 7-10dB, and current modulation coding mode is BPSK3/4, then needs execution in step S106 that current modulation coding mode is changed to the corresponding modulation coding mode QPSK1/2 of the interval 7-10dB of signal to noise ratio by current BPSK3/4.
When the cycle monitoring signal to noise ratio, then the cycle signal to noise ratio that can obtain according to a certain monitoring periods is determined its present signal to noise ratio interval, determines whether to change modulation coding mode according to the interval corresponding modulation coding mode of this signal to noise ratio again.
Step S107, the bandwidth of the described wireless transmission channel that acquisition adapts according to the modulation coding mode after the change.
For example, in above-mentioned steps S105-S106, because the signal to noise ratio interval of the current signal to noise ratio 8dB correspondence that monitors is not the current corresponding signal to noise ratio of modulation coding mode BPSK3/4 interval, therefore current modulation coding mode is changed to the interval corresponding modulation coding mode QPSK1/2 of the present signal to noise ratio of current signal to noise ratio 8dB, and by the change after the corresponding bandwidth of modulation coding mode QPSK1/2 be 13.34Mbps, therefore, can determine that the current bandwidth of wireless transmission channel is 13.34Mbps.
Step S108 reaches the bandwidth ratio that disposes respectively for the one or more data acquisition units that are used for data acquisition according to the current bandwidth of wireless transmission channel and recaptures the maximum acquisition rate of getting each data acquisition unit.
In actual applications, can be each data acquisition unit difference allocation of transmission bandwidth in the wireless transmission channel, for the transmission bandwidth that each data acquisition unit distributes can be according to determining for the grade of service of each data acquisition unit configuration, for example, the grade of service that disposes for certain data acquisition unit is one-level, and the corresponding bandwidth proportion that distributes of grade of service one-level is 80%, if the current bandwidth of described wireless transmission channel is 10Mbps, then the bandwidth for described data acquisition unit configuration is 8Mbps, determines that the maximum acquisition rate in described wireless transmission channel of described data acquisition unit should be 8Mbps.Described acquisition rate refers to data acquisition unit to the speed of wireless transmitter transmission image data, and the image data that described wireless transmitter can be sent data acquisition unit sends by wireless transmission channel.Owing to may not only have only a collector in the wireless transmission channel, each wireless transmitter may connect data acquisition unit, when transmitting data simultaneously for fear of a plurality of network collection devices, a certain moment data are increased sharply in the wireless transmission channel that causes because transmission rate is too high, therefore, can be according to distributing bandwidth respectively for each data acquisition unit, for example, 3 data collectors are arranged, the grade of service is respectively one-level, secondary, three grades, and the bandwidth proportion of their grade of service correspondence is respectively 50%, 30%, 20%, if the current bandwidth of wireless transmission channel is 10Mbps, be above-mentioned three data collectors difference configured bandwidth 5Mbps, 3Mbps, 2Mbps, and according to being the bandwidth that above-mentioned three data collectors distribute, their maximum acquisition rate is adjusted into 5Mbps respectively, 3Mbps and 2Mbps.
Step S109, according to the maximum acquisition rate adjustment of each data acquisition unit by the transmission of described wireless transmission channel to the image data of each data acquisition unit.
In step S109, the mode that can adopt transmission rate to regulate message is controlled the maximum acquisition rate of each data acquisition unit.For example, some data acquisition unit, first-class as network shooting, itself have the function of automatic adjusting transmission rate, maximum acquisition rate can be configured to fixed mode and adjusting pattern automatically.Fixed mode refers to regardless of channel quality, and the acquisition rate of IP Camera is always the value that the user sets; And referring to the maximum acquisition rate of IP Camera, adjusting pattern automatically can automatically adjust according to the quality of wireless channel of reality, therefore according among the above-mentioned steps S104-S108, thereby the maximum acquisition rate of the described IP Camera that the monitoring of quality of wireless channel is obtained, between S108 and S109, can also comprise the step that sends the rate adaptation message of carrying described maximum acquisition rate to described IP Camera, thereby make described IP Camera regulate the maximum acquisition rate that sends corresponding image data and then influence described wireless sending module by the transmission of described wireless transmission channel to the image data of each data acquisition unit according to described rate adaptation message.
With an embodiment wireless transmitter of the present invention is described below, as shown in Figure 3, described wireless transmitter 10 is connected with one or more data acquisition units, can adopt wired connection modes such as netting twine to connect, can adopt other modes to connect, the present invention does not limit yet.Described wireless transmitter comprises: wireless sending module 11, channel quality monitoring means 12, transmission rate control unit 13.
Described wireless transmitter comprises wireless sending module 11, and the image data that each data acquisition unit that is used for receiving is sent sends by wireless transmission channel according to the corresponding maximum acquisition rate of each data acquisition unit.
The channel quality monitoring means 12 of described wireless transmitter is used for obtaining the current bandwidth of described wireless transmission channel; Be further used for the signal to noise ratio of described transmission signal is monitored, detect corresponding signal to noise ratio interval according to described signal to noise ratio, obtain the current bandwidth of described wireless transmission channel in conjunction with the interval corresponding relation with described bandwidth of the signal to noise ratio of pre-configured described wireless transmission channel again.
Described transmission rate control unit 13, be used for reaching the bandwidth ratio that disposes respectively for described one or more data acquisition units according to the current bandwidth of described wireless transmission channel and recapture the maximum acquisition rate of getting each data acquisition unit, and described maximum acquisition rate is sent to corresponding data acquisition unit so that corresponding data acquisition unit adjustment sends the maximum acquisition rate of described image data separately to described wireless sending module.
The channel quality monitoring means 12 of described wireless transmitter before channel quality is monitored, will dispose the signal to noise ratio interval of wireless transmission channel and the corresponding relation of bandwidth earlier.
Described channel quality monitoring means 12, be further used for by system testing obtain described wireless transmission channel the one or more signal to noise ratios under the different channels quality and corresponding adaptive in described wireless transmission channel the modulation coding mode of transmission signal, thereby obtain the corresponding relation of the interval and adaptive modulation coding mode of different signal to noise ratios; According to the corresponding relation of the modulation coding mode in signal to noise ratio interval and the wireless transmission channel in the wireless transmission channel that obtains and the corresponding relation of modulation coding mode and channel width, set up the corresponding relation of the bandwidth of the interval and adaptive modulation coding mode of different signal to noise ratios and described wireless transmission channel.
In the wireless transmission channel, for certain given signal to noise ratio, can mate the interval corresponding optimal modulation coding mode of the residing signal to noise ratio of this signal to noise ratio for it, also can think, different modulation coding modes accommodates different signal to noise ratio intervals, this corresponding relation depends on system performance, and the interval corresponding optimal modulation coding mode of signal to noise ratio is not necessarily identical in the different systems.Therefore, can obtain in the current system corresponding relation of the interval modulation coding mode with the transmission signal of the signal to noise ratio of wireless transmission channel by system testing repeatedly.And modulation coding mode and the bandwidth of channel also are corresponding relations in the wireless transmission channel, and various coded systems have corresponding channel width.Therefore, can obtain the bandwidth of the described wireless transmission channel that adapts according to each modulation coding mode.
Then, described channel quality monitoring means 12, behind the corresponding relation of the signal to noise ratio interval that disposes wireless transmission channel and bandwidth, described channel quality monitoring modular is monitored channel quality.
Described channel quality monitoring means 12 is further used in real time or the signal to noise ratio of the described wireless transmission channel of cycle monitoring, judges that the signal to noise ratio that monitors is whether in the corresponding signal to noise ratio of the modulation coding mode of current use interval; Wherein, signal to noise ratio being monitored in real time, is exactly the numerical value that obtains current signal to noise ratio in real time, and judges whether the numerical value of the current signal to noise ratio that real-time monitors is in the corresponding signal to noise ratio of the modulation coding mode interval of current use.Signal to noise ratio is periodically monitored, be exactly in monitoring periods, every the scheduled time, signal to noise ratio to channel is once monitored, obtain the true signal to noise ratio of current time, the true signal to noise ratio that the calculating signal to noise ratio that last time is calculated and this monitoring obtain, according to predetermined proportion addition, the numerical value that obtains is as this calculating signal to noise ratio; The calculating signal to noise ratio that last weighting is obtained is as the signal to noise ratio of current monitoring periods.When the described signal to noise ratio that monitors not when the corresponding signal to noise ratio of the modulation coding mode of current use is interval, current modulation coding mode is changed to the interval corresponding modulation coding mode of the residing signal to noise ratio of described signal to noise ratio, and the bandwidth of the described wireless transmission channel that acquisition adapts according to the modulation coding mode after the change.
The corresponding relation of and the modulation coding mode that be fit to interval according to pre-configured signal to noise ratio and with the corresponding relation of bandwidth, judge the corresponding signal to noise ratio of the modulation coding mode the interval whether current signal to noise ratio that monitors is in current use.If current signal to noise ratio is in the corresponding signal to noise ratio of the current modulation coding mode interval, then do not need to change current modulation coding mode, the channel quality monitoring modular continues in real time or the current signal to noise ratio of the described wireless transmission channel of cycle monitoring; And if current signal to noise ratio is or not the corresponding signal to noise ratio of current modulation coding mode interval, then the channel quality monitoring modular changes to the interval corresponding modulation coding mode of the residing signal to noise ratio of described signal to noise ratio with current modulation coding mode.And, the bandwidth of the described wireless transmission channel that acquisition adapts according to the modulation coding mode after the change.
Described transmission rate control unit 13, be further used for sending the rate adaptation message of carrying described maximum acquisition rate to each data acquisition unit, thereby make described data acquisition unit, by resolving rate adaptation message, obtain the corresponding maximum acquisition rate of each data acquisition unit that carries in the described message, adjust the maximum acquisition rate that sends corresponding image data.
As shown in Figure 4, data acquisition system 40 among the present invention comprises the wireless transmitter 10 described in above-described embodiment and the one or more data acquisition units 20 that are connected with described wireless transmitter respectively, and described wireless transmitter 10 can send the image data of described data acquisition unit 20 acquisitions.
Described data acquisition unit 20 further comprises: data transmission unit 21 is used for the acquisition image data and is transferred to described wireless transmitter sending; And
Transmission rate adjustment unit 22, be used for to receive the rate adaptation message that the transmission rate control unit of described wireless transmitter sends, and be set to the maximum acquisition rate that carries in the described rate adaptation message according to the maximum acquisition rate of the described data transmission unit of described rate adaptation message.
The transmission rate adjustment unit 22 of described each data acquisition unit, judge whether the rate adaptation message from the wireless transmitter 10 that is attached thereto, if have, the maximum acquisition rate that the transmission rate adjustment unit 22 of data acquisition unit 20 is arranged to the maximum acquisition rate of self to carry in the message.
Above-mentioned data acquisition system 40 is corresponding with the collecting method of automatic adjusting wireless transmission rate of the present invention, but the detail cross-reference.
The above is embodiments of the invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within the claim scope of the present invention.
Claims (11)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310191436.9A CN103297191B (en) | 2013-05-21 | 2013-05-21 | It is automatically adjusted collecting method and the data collecting system of wireless transmission rate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310191436.9A CN103297191B (en) | 2013-05-21 | 2013-05-21 | It is automatically adjusted collecting method and the data collecting system of wireless transmission rate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103297191A true CN103297191A (en) | 2013-09-11 |
| CN103297191B CN103297191B (en) | 2016-12-28 |
Family
ID=49097561
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310191436.9A Expired - Fee Related CN103297191B (en) | 2013-05-21 | 2013-05-21 | It is automatically adjusted collecting method and the data collecting system of wireless transmission rate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103297191B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015157934A1 (en) * | 2014-04-16 | 2015-10-22 | 华为技术有限公司 | Bandwidth variable modulation method, apparatus and system |
| CN109756301A (en) * | 2019-01-11 | 2019-05-14 | 珠海泰芯半导体有限公司 | The selection method of wireless communication transmissions bandwidth and modulation system |
| CN111886819A (en) * | 2018-03-13 | 2020-11-03 | Abb瑞士股份有限公司 | Intelligent electronic device comprising a cellular radio module |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6959171B2 (en) * | 2002-02-28 | 2005-10-25 | Intel Corporation | Data transmission rate control |
| CN101582839A (en) * | 2008-05-14 | 2009-11-18 | 华为技术有限公司 | Method, device and system for regulating data traffic |
| CN102387100A (en) * | 2011-11-28 | 2012-03-21 | 中国电子科技集团公司第五十四研究所 | Channel estimation and adaptive transmission method for variable bandwidth system |
-
2013
- 2013-05-21 CN CN201310191436.9A patent/CN103297191B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6959171B2 (en) * | 2002-02-28 | 2005-10-25 | Intel Corporation | Data transmission rate control |
| CN101582839A (en) * | 2008-05-14 | 2009-11-18 | 华为技术有限公司 | Method, device and system for regulating data traffic |
| CN102387100A (en) * | 2011-11-28 | 2012-03-21 | 中国电子科技集团公司第五十四研究所 | Channel estimation and adaptive transmission method for variable bandwidth system |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015157934A1 (en) * | 2014-04-16 | 2015-10-22 | 华为技术有限公司 | Bandwidth variable modulation method, apparatus and system |
| CN105191244A (en) * | 2014-04-16 | 2015-12-23 | 华为技术有限公司 | Modulation method, device and system with variable bandwidth |
| CN105191244B (en) * | 2014-04-16 | 2019-04-23 | 华为技术有限公司 | Modulation method, device and system with variable bandwidth |
| CN111886819A (en) * | 2018-03-13 | 2020-11-03 | Abb瑞士股份有限公司 | Intelligent electronic device comprising a cellular radio module |
| CN111886819B (en) * | 2018-03-13 | 2022-02-18 | Abb瑞士股份有限公司 | Intelligent electronic device comprising a cellular radio module and communication method |
| US11665563B2 (en) | 2018-03-13 | 2023-05-30 | Abb Schweiz Ag | Intelligent electronic device comprising a cellular radio module |
| CN109756301A (en) * | 2019-01-11 | 2019-05-14 | 珠海泰芯半导体有限公司 | The selection method of wireless communication transmissions bandwidth and modulation system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103297191B (en) | 2016-12-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20220006847A1 (en) | User equipment and media streaming network assistance node | |
| AU2017221833B2 (en) | Device and method for characterization and optimization of multiple simultaneous real-time data connections | |
| KR101519337B1 (en) | Multiple channel support in distributed wireless systems | |
| KR101065972B1 (en) | Transmission Bandwidth Measurement System and Method for Media Streaming | |
| CN108261763B (en) | Acceleration system of game running environment | |
| US20060039346A1 (en) | Transmitting information through a communication link and monitoring link quality | |
| CA2856265C (en) | Upstream channel bonding partial service using spectrum management | |
| US20170170976A1 (en) | Method and system for a high capacity cable network | |
| US8873414B2 (en) | Communication apparatus, communication method, and communication system | |
| CA2871832C (en) | Ensure upstream channel quality measurement stability in an upstream channel bonding system using t4 timeout multiplier | |
| JP2008172351A5 (en) | ||
| CN101247286B (en) | Method and system for service quality detection of video distribution system | |
| CN103297191A (en) | Data acquisition method for automatically adjusting wireless transmission rate and data acquisition system | |
| TW201946409A (en) | Method and system for long-distance full-duplex wireless communication | |
| US20170195825A1 (en) | Wireless Sensor Network and Association Request Transmission Method | |
| CN106657364A (en) | Internet of things device and gateway device | |
| CN103841605A (en) | Method and device for achieving coprocessing of baseband signal among multipe BBU devices | |
| CN110099409B (en) | Method and system for controlling client access by Mesh networking AP | |
| CN107241754A (en) | Adaptive uplink reference signal transmission and corresponding functional unit | |
| CN104967880A (en) | Method and equipment for uniformly distributing videos in wireless network | |
| JP2005006358A (en) | Burst signal transmission method and apparatus, information distribution method and information distribution control apparatus in mobile communication system | |
| CN111182508B (en) | LoRa communication network and communication method thereof | |
| WO2022051746A1 (en) | Real-time dynamic bandwidth expansion | |
| KR100848923B1 (en) | Cable network system using channel bonding, channel inspecting method and channel moving method | |
| US20150091721A1 (en) | Signal level monitoring system that minimizes false alarms |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
Owner name: INST OF MICROELECTRONICS, C. A. S Free format text: FORMER OWNER: JIANGSU INTERNET OF THINGS RESEARCH + DEVELOMENT CO., LTD. Effective date: 20150624 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20150624 Address after: 100029 Beijing city Chaoyang District Beitucheng West Road No. 3 Applicant after: Institute of Microelectronics of the Chinese Academy of Sciences Address before: 214135 Jiangsu province Wuxi city Wuxi District Road No. 200 China Linghu Sensor Network International Innovation Park building C Applicant before: JIANGSU R & D CENTER FOR INTERNET OF THINGS |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20160107 Address after: 214135 Jiangsu Wuxi District Road No. 200 China Linghu Sensor Network International Innovation Park C building 10 floor Applicant after: JIANGSU ZHONGKE YILIAN COMMUNICATION TECHNOLOGY Co.,Ltd. Address before: 100029 Beijing city Chaoyang District Beitucheng West Road No. 3 Applicant before: Institute of Microelectronics of the Chinese Academy of Sciences |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PP01 | Preservation of patent right | ||
| PP01 | Preservation of patent right |
Effective date of registration: 20230905 Granted publication date: 20161228 |
|
| PD01 | Discharge of preservation of patent | ||
| PD01 | Discharge of preservation of patent |
Date of cancellation: 20240119 Granted publication date: 20161228 |
|
| 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: 20161228 |