CN101150501A - Self-adapted adjustment method for network speed in radio bandwidth access network - Google Patents
Self-adapted adjustment method for network speed in radio bandwidth access network Download PDFInfo
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Abstract
The invention relates to a self-adapting method for adjusting network transmission rate in wireless broadband access networks, which includes the following steps: the transmission state of data packets is detected in a given time period by a timer; transmission rate is up-regulated when transmitting data packets meet threshold H; the transmission rate is down-regulated when transmitting data packets meet threshold L instead of threshold H; transmission rate is not regulated when transmitting data packets meet neither threshold H nor threshold L; in which, threshold H is equal to (FER is less than A) and amp; and amp; (10 multiplied by the number of data packets retransmitted is less than the number of data packets which are not retransmitted); L is equal to (FER is more than B) and amp; and amp; (3 multiplied by the number of data packets retransmitted is more than the number of data packets which are not retransmitted); the FER represents the error probability of a frame. The invention has the advantages by which the operation is simple and easy to implement, the network transmission rate can be controlled and monitored at any time, and the coverage of wireless networks can be enlarged effectively to ensure that users enjoy customized wireless broadband access services with high speed data transmission based on stable and reliable transmission rate.
Description
Technical field
The present invention relates to the rate adjusting method of WLAN, specifically is self-adapted adjustment method for network speed in the radio bandwidth access network.
Background technology
WLAN (wireless local area network) has become one of high-speed radio access network at present with fastest developing speed, and it makes people thoroughly break away from the constraint of wire cable, enjoys the enjoyment that high-speed wireless access brings people.Continuous development along with wireless local area network technology, the continuous decline of wireless product price, increasing office, family bring into use WLAN (wireless local area network), the thing followed, some users begin to occur the network blockage problem, cause that network speed descends, goes offline, network work is undesired or the like.
The WLAN specification is by the up-to-date IEEE802.11a/g of early stage IEEE802.11b, under wireless environment, how adopt only demodulation techniques to go to be used as message transmission rate according to the state variation of channel is very important problem always, and channel information can be learnt by signal to noise ratio (SN), transmit signal strength (TSSI), received signal intensity (RSSI), packet loss factors such as (FER).
Summary of the invention
The objective of the invention is to carry that arch a kind ofly simple to operately is easy to realize, network rate can be controlled and be monitored at any time, and can effectively increase wireless network coverage, guarantee that the user can carry out self-adapted adjustment method for network speed in the radio bandwidth access network of transfer of data by setting up reliable and stable speed.
Technical scheme of the present invention is achieved in that
At first, utilize timer to detect at certain hour in the cycle status transmission of packet;
When the transmission packet meets thresholding H, raise speed;
When the transmission packet does not meet thresholding H but meets thresholding L, downward modulation speed;
When sending packet and neither meet thresholding H and do not meet thresholding L again, do not adjust speed.
Wherein: the thresholding H=(﹠amp of FER＜A); ﹠amp; (10* retransmission data packet may quantity＜no retransmission data packet may quantity); L=(the ﹠amp of FER＞B); ﹠amp; (3 * retransmission data packet may quantity＞no retransmission data packet may quantity), FER represents the wrong general of every frame.
Secondly, when packet meets thresholding H, raise the rate request number of times and add 1, judge that more whether request number of times is more than or equal to T; Wherein, T=MIN ((MAX (1, KT), X), K=(low rate transmitting time/two-forty transmitting time) * delay parameter;
When request number of times during more than or equal to T, speed raises, and request number of times puts 0 simultaneously;
When request number of times during, abandon adjusting speed less than T.
Once more, when packet does not meet thresholding H but meets thresholding L, judge and raise whether sign C is 1;
Raising sign C is 1, and T=1 is set, C=0, count=0, downward modulation speed;
Raising sign C is 0, and T=KT is set, C=0, count=0, downward modulation speed.
The present invention is owing to adopted such scheme, not only the variation to channel can reflect fast, can ensure user's practical communication, improve any wireless network services quality, and, farthest suppressed " ping-pong " of transmission rate between two adjacent speed, guaranteed to carry out transfer of data by setting up reliable and stable speed between terminal and the access device; The present invention is simple to operate to be easy to realize, speed is adjusted rhythm and can be controlled and monitor at any time, has not only effectively increased the coverage of wireless network, and guarantees that the user of certain limit can enjoy the WiMAX access service of two-forty customization.
The present invention is further illustrated below in conjunction with accompanying drawing.
Description of drawings
Fig. 1 is that rate adaptation of the present invention is adjusted flow chart.
Embodiment
As shown in the figure, the present invention is a self-adapted adjustment method for network speed in the radio bandwidth access network, and its step comprises:
1, with the relevant device association, related failure then need be adjusted the physical distance between terminal and the access point, is successfully associated beginning set device both sides' initial rate;
The setting of initial rate is relevant with the condition of rate adaptation, and rate adaptation adopts timer, and rate adaptation is long more at interval, initial rate is high more, rate adaptation is short more at interval, and initial rate is low more, can obtain a relatively more balanced effect like this when accessing terminal to network.
2, after timer is finished a time cycle, detect at this moment between in, send the situation of packet, when the packet that sends meets thresholding H, raise the rate request number of times and add 1, when not meeting thresholding H, detect whether meet thresholding L; Thresholding H, thresholding L are the integrated condition of FER and frame number of retransmissions, wherein, and the H=(﹠amp of FER＜A); ﹠amp; (10* retransmission data packet may quantity＜no retransmission data packet may quantity); L=(the ﹠amp of FER＞B); ﹠amp; (3 * retransmission data packet may quantity＞no retransmission data packet may quantity);
When meeting thresholding H, illustrate that the transmission situation is very good, can ask to raise speed, after rise request number of times (count) adds 1, whether judge it more than or equal to T, if more than or equal to T, then speed is raised, will raise the request number of times zero clearing simultaneously, wait for next timer cycle then; If less than T, then abandon adjusting, wait for next timer cycle.The design that speed raises request number of times T is in order to prevent transmission rate rapid fluctuations between two adjacent speed, if this situation, speed raises request number of times T and will increase fast along with the increase of fluctuation number of times, wherein;
T＝MIN((MAX(1，KT)，X)；
K=(low rate transmitting time/two-forty transmitting time) * delay parameter;
Delay parameter designs according to parameter X, parameter X is set at interval according to timer, X and timer time size has at interval determined in the worst case, the minimal ripple cycle that transmission rate fluctuates between two adjacent speed, under worst case, minimal ripple cycle=timer is * (X+1) at interval;
Delay parameter determined when rate fluctuation, and the minimal ripple cycle is in the velocity variations of interval [(timer is * 2 at interval, and timer is * (X+1) at interval].
When meeting thresholding L, illustrate that the transmission situation is very poor under present rate, need downward modulation speed.At first judging and raise whether sign C is 1, is 1 if raise sign C, and T=1 is set, C=0, and Count=0 with the speed downward modulation, waits for next timer cycle; If raising sign C is 0, T=KT is set, C=0, Count=0 with the speed downward modulation, waits for next timer cycle.When not meeting thresholding L, abandon adjusting, wait for next timer cycle.
Speed raises and indicate that C sets at every turn when raising speed, and this sign is that the speed in the fluctuation type is reduced or the speed of other types is reduced when having distinguished downward modulation speed, wherein:
The speed downward modulation of fluctuation type had individual speed to raise before the speed downward modulation, in this case, just T need be adjusted, to stop the very fast rise once more of speed.
Common speed downward modulation is moved as terminal, and the distance between terminal and the AP is zoomed out, and under these circumstances, T is set to 1, guarantees under the good situation of channel speed is raised fast, finds balance point as early as possible.
This sign of timing C is set to 1 on speed, after the speed downward modulation, indicates that C is set to 0.
Claims (5)
1. self-adapted adjustment method for network speed in the radio bandwidth access network is characterized in that: comprise the steps:
(1) utilize timer to detect at certain hour in the cycle status transmission of packet;
(2) when the transmission packet meets thresholding H, raise speed; When the transmission packet does not meet thresholding H but meets thresholding L, downward modulation speed; When sending packet and neither meet thresholding H and do not meet thresholding L again, do not adjust speed.
2. rate adaptation method of adjustment according to claim 1 is characterized in that: when above-mentioned packet meets thresholding H, raise the rate request number of times and add 1, judge that more whether request number of times is more than or equal to T;
When request number of times during more than or equal to T, speed raises, and request number of times puts 0 simultaneously;
When request number of times during, abandon adjusting speed less than T.
3. rate adaptation method of adjustment according to claim 1 and 2 is characterized in that: above-mentioned packet does not meet thresholding H but when meeting thresholding L, judges and raise whether sign C is 1;
Raising sign C is 1, and T=1 is set, C=0, count=0, downward modulation speed;
Raising sign C is 0, and T=KT is set, C=0, count=0, downward modulation speed.
4. rate adaptation method of adjustment according to claim 1 is characterized in that: the above-mentioned thresholding H=(﹠amp of FER＜A); ﹠amp; (10* retransmission data packet may quantity＜no retransmission data packet may quantity); L=(the ﹠amp of FER＞B); ﹠amp; (3 * retransmission data packet may quantity〉no retransmission data packet may quantity), FER represents the error probability of every frame.
5. according to claim 2 or 3 described rate adaptation methods of adjustment, it is characterized in that: above-mentioned T=MIN ((MAX (1, KT), X); K=(low rate transmitting time/two-forty transmitting time) * delay parameter.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2007100311439A CN101150501A (en) | 2007-10-31 | 2007-10-31 | Self-adapted adjustment method for network speed in radio bandwidth access network |
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| CNA2007100311439A CN101150501A (en) | 2007-10-31 | 2007-10-31 | Self-adapted adjustment method for network speed in radio bandwidth access network |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102111807A (en) * | 2009-12-23 | 2011-06-29 | 北京中电华大电子设计有限责任公司 | Automatic regulation method of sending rate for wire local area network (WLAN) system |
| CN102348238A (en) * | 2010-07-30 | 2012-02-08 | 杭州华三通信技术有限公司 | Method for sending wireless message and device thereof |
| CN102468883A (en) * | 2010-11-16 | 2012-05-23 | 北京中电华大电子设计有限责任公司 | Speed regulation method for sending aggregation frame by 802.11n |
| CN103986554A (en) * | 2014-04-21 | 2014-08-13 | 深圳市九二一云网络科技有限公司 | Quick and smooth transmission rate switching method and system for mobile device |
| CN104022843A (en) * | 2014-04-01 | 2014-09-03 | 天津大学 | Self-adaptive data transmission speed adjustment algorithm based on long-distance wireless network |
| CN104640161A (en) * | 2015-01-13 | 2015-05-20 | 中国联合网络通信集团有限公司 | Method for adjusting data transmission rate and AP (Access Point) equipment |
| CN104852785A (en) * | 2015-04-22 | 2015-08-19 | 深圳市元征科技股份有限公司 | Data transmission method and data transmission device |
| CN104936215A (en) * | 2015-06-17 | 2015-09-23 | 福建联迪商用设备有限公司 | Method and system for adjusting Wi-Fi (Wireless Fidelity) dynamic rate |
| CN105338576A (en) * | 2014-08-01 | 2016-02-17 | 展讯通信（上海）有限公司 | Method and device for controlling transmission rate of physical layer |
| WO2016138669A1 (en) * | 2015-03-03 | 2016-09-09 | 友达光电股份有限公司 | Server and operation method thereof |
| CN106385303A (en) * | 2016-08-30 | 2017-02-08 | 中兴长天信息技术（南昌）有限公司 | Adaptive information rate adjusting method of LORA wireless transmission system for Internet of Things (IoT) |
| CN110531651A (en) * | 2019-07-30 | 2019-12-03 | 中国人民解放军陆军工程大学 | Rate control device suitable for Ethernet transmission |
-
2007
- 2007-10-31 CN CNA2007100311439A patent/CN101150501A/en active Pending
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102111807A (en) * | 2009-12-23 | 2011-06-29 | 北京中电华大电子设计有限责任公司 | Automatic regulation method of sending rate for wire local area network (WLAN) system |
| CN102348238A (en) * | 2010-07-30 | 2012-02-08 | 杭州华三通信技术有限公司 | Method for sending wireless message and device thereof |
| CN102348238B (en) * | 2010-07-30 | 2013-01-30 | 杭州华三通信技术有限公司 | Method for sending wireless message and device thereof |
| CN102468883A (en) * | 2010-11-16 | 2012-05-23 | 北京中电华大电子设计有限责任公司 | Speed regulation method for sending aggregation frame by 802.11n |
| CN104022843A (en) * | 2014-04-01 | 2014-09-03 | 天津大学 | Self-adaptive data transmission speed adjustment algorithm based on long-distance wireless network |
| CN104022843B (en) * | 2014-04-01 | 2018-01-05 | 天津大学 | System adaptive recognition rate adjusting method based on long range wireless network |
| CN103986554A (en) * | 2014-04-21 | 2014-08-13 | 深圳市九二一云网络科技有限公司 | Quick and smooth transmission rate switching method and system for mobile device |
| CN105338576A (en) * | 2014-08-01 | 2016-02-17 | 展讯通信（上海）有限公司 | Method and device for controlling transmission rate of physical layer |
| CN105338576B (en) * | 2014-08-01 | 2019-03-29 | 展讯通信（上海）有限公司 | The control method and device of the transmission rate of physical layer |
| CN104640161A (en) * | 2015-01-13 | 2015-05-20 | 中国联合网络通信集团有限公司 | Method for adjusting data transmission rate and AP (Access Point) equipment |
| WO2016138669A1 (en) * | 2015-03-03 | 2016-09-09 | 友达光电股份有限公司 | Server and operation method thereof |
| CN104852785A (en) * | 2015-04-22 | 2015-08-19 | 深圳市元征科技股份有限公司 | Data transmission method and data transmission device |
| CN104936215A (en) * | 2015-06-17 | 2015-09-23 | 福建联迪商用设备有限公司 | Method and system for adjusting Wi-Fi (Wireless Fidelity) dynamic rate |
| CN106385303A (en) * | 2016-08-30 | 2017-02-08 | 中兴长天信息技术（南昌）有限公司 | Adaptive information rate adjusting method of LORA wireless transmission system for Internet of Things (IoT) |
| CN110531651A (en) * | 2019-07-30 | 2019-12-03 | 中国人民解放军陆军工程大学 | Rate control device suitable for Ethernet transmission |
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