CN111654418A - Self-adaptive real-time detection method for available bandwidth of wireless network - Google Patents
Self-adaptive real-time detection method for available bandwidth of wireless network Download PDFInfo
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- CN111654418A CN111654418A CN202010528516.9A CN202010528516A CN111654418A CN 111654418 A CN111654418 A CN 111654418A CN 202010528516 A CN202010528516 A CN 202010528516A CN 111654418 A CN111654418 A CN 111654418A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
- H04L43/0876—Network utilisation, e.g. volume of load or congestion level
- H04L43/0882—Utilisation of link capacity
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
- H04L43/0876—Network utilisation, e.g. volume of load or congestion level
- H04L43/0894—Packet rate
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/08—Testing, supervising or monitoring using real traffic
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention discloses a self-adaptive real-time detection method for available bandwidth of a wireless network, which is characterized by comprising at least one wireless route and at least one mobile receiving end, wherein the specific detection method comprises the following steps: A) when the data volume sent by the wireless router is larger than 100Kb/s, detecting the bandwidth by adopting a second frequency; B) the wireless router can calculate the packet loss rate according to the information in the RTCP feedback packet; C) smoothing the packet loss rate lambda through a filter, wherein lambda is a lambda + (1-a) b; D) when the data volume sent by the wireless router is less than 100Kb/s, detecting the bandwidth by adopting a first frequency; through having designed this application, adopt the occupation to the bandwidth of two kinds of different frequencies to detect, and adopt and increase progressively and degressive formula to calculate, along with the idle time of bandwidth increases, corresponding detection frequency descends, otherwise along with the time increase that the bandwidth occupied, corresponding detection frequency increases, when guaranteeing to detect the bandwidth accuracy, occupation of reducible resource has reduced the energy consumption.
Description
Technical Field
The invention belongs to the technical field of bandwidth detection, and particularly relates to a self-adaptive real-time detection method for available bandwidth of a wireless network.
Background
The existing available bandwidth detection method adopts a model-based control algorithm, although network fluctuation can be accurately detected, the calculated amount is large, and when the bandwidth is not occupied for a long time, the bandwidth is still in a background high-frequency detection state, so that the energy consumption is increased, and therefore, a wireless network available bandwidth self-adaptive real-time detection method is provided.
Disclosure of Invention
The present invention aims to provide a method for adaptively detecting the available bandwidth of a wireless network in real time, so as to solve the problems in the background art.
In order to achieve the purpose, the invention adopts the following technical scheme: the self-adaptive real-time detection method for the available bandwidth of the wireless network is characterized by comprising at least one wireless route and at least one mobile receiving end, and the specific detection method comprises the following steps:
A) when the data volume sent by the wireless router is larger than 100Kb/s, detecting the bandwidth by adopting a second frequency;
B) the wireless router can calculate the packet loss rate according to the information in the RTCP feedback packet;
C) smoothing the packet loss rate lambda through a filter, wherein lambda is a lambda + (1-a) b;
D) when the data volume sent by the wireless router is less than 100Kb/s, detecting the bandwidth by adopting a first frequency, wherein the frequency of the first frequency is less than a second frequency;
further, the first frequency is specifically an≥a1(n ≧ 2), where n is the duration of the wireless route transmitting an amount of data less than 100Kb/s in units of s, anThe frequency is detected, and each term from the second term is not less than its previous term.
Further, the second frequency is a decreasing formula as opposed to an increasing formula.
Further, the method can be used for preparing a novel materialIn step C, λ is the latest calculated packet loss rate, b is the packet loss rate currently in use, and a is the weight (0)<a<1) Setting two threshold values lambdac, lambada1According to the smoothed packet loss rate λ, three situations can be estimated.
Further, three cases are estimated as follows:
when λ > λ c, the network is congested;
when lambda is<λ1When the network is idle;
when lambda is1＝<λ<At λ c, the network load is moderate.
Further, let MaxRate be the maximum output bit rate of the sender,/be the minimum output bit rate of the sender, Speed0 be the initial rate, Step be the linear increment of the rate, and β be the multiplicative reduction factor.
Further, the wireless route initial rate Speed0 sends a data Speed ═ Speed 0; (MinRate is less than or equal to Speed is less than or equal to MaxRate).
Further, the packet loss rate is calculated according to the information in the RTCP packet fed back by the mobile receiving terminal, and after smoothing processing, network load judgment is carried out and the output code rate is adjusted.
Compared with the prior art, the invention has the beneficial effects that:
through having designed this application, adopt the occupation to the bandwidth of two kinds of different frequencies to detect, and adopt and increase progressively and degressive formula to calculate, to increasing along with the idle time of bandwidth, corresponding detection frequency descends, otherwise along with the time increase that the bandwidth occupied, corresponding detection frequency increases, when guaranteeing to detect the bandwidth accuracy, occupation of reducible resource has reduced the energy consumption.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention.
FIG. 1 is a flow chart of the present invention;
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1, the invention provides a technical scheme: the self-adaptive real-time detection method of the available bandwidth of the wireless network comprises at least one wireless route and at least one mobile receiving end, and the specific detection method comprises the following steps:
A) when the data volume sent by the wireless router is larger than 100Kb/s, detecting the bandwidth by adopting a second frequency, wherein the second frequency is a decreasing formula opposite to the increasing formula, and when the duration time of the data volume sent by the wireless router is larger than 100Kb/s is increased, the interval of the second frequency detection is reduced;
B) the wireless router can calculate the packet loss rate according to the information in the RTCP feedback packet;
C) smoothing the packet loss rate lambda through a filter, wherein lambda is a lambda + (1-a) b;
D) when the data volume sent by the wireless router is less than 100Kb/s, detecting the bandwidth by adopting a first frequency, wherein the frequency of the first frequency is less than a second frequency, and the first frequency is specifically an≥a1(n ≧ 2), where n is the duration of the wireless route transmitting an amount of data less than 100Kb/s in units of s, anDetecting frequencies, wherein each item is not less than the previous item from the second item, and when the duration time of the data quantity transmitted by the wireless router is less than 100Kb/s is increased, the interval of the detection of the first frequency is increased;
in this embodiment, further, in the step C, λ is a latest calculated packet loss ratio, b is a packet loss ratio currently in use, and a is a weight (0)<a<1) Setting two threshold values lambdac, lambada1According to the smoothed packet loss rate λ, three situations can be estimated.
In this embodiment, further, three estimated situations are as follows:
when λ > λ c, the network is congested;
when lambda is<λ1When the network is idle;
when lambda is1＝<λ<＝λAnd c, the network load is moderate.
In this embodiment, further, let MaxRate be the maximum output bit rate of the sender,/be the minimum output bit rate of the sender, Speed0 be the initial rate, Step be the linear increment of the rate, and β be the multiplicative reduction factor.
In this embodiment, further, the wireless router initial rate Speed0 sends data Speed ═ Speed 0; (MinRate is less than or equal to Speed is less than or equal to MaxRate).
In this embodiment, further, the packet loss rate is calculated according to the information in the RTCP packet fed back by the mobile receiving end, and after smoothing, network load determination is performed and the output code rate is adjusted;
sending an RTCP feedback packet to a sending end every time N data packets are received or at most 5s, wherein the RTCP feedback packet comprises QoS information in a period from sending of the last feedback packet to sending of the packet, the feedback congestion control strategy can enable the whole H264 video transmission system to monitor the change of bandwidth in real time, dynamically change the output code rate, fully utilize the current bandwidth, reduce the multiplicative sending rate when the network is congested, reduce the requirement on the required bandwidth, and set a minimum sending code rate MinRate to ensure the minimum bandwidth required by the sending end; when the network is idle, linearly increasing the sending code rate, and simultaneously setting a maximum sending code rate MaxRate to ensure that the sending end does not excessively occupy resources; when the network load is normal, no adjustment is made. Because the sending end adopts the AIMD strategy similar to that in TCP congestion control, the time that the real-time transmission system is in a congestion state can be further shortened, the packet loss rate and the time delay are further reduced, good service quality is provided for users, and the fairness of bandwidth competition with data streams of other protocols is ensured.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (8)
1. The self-adaptive real-time detection method for the available bandwidth of the wireless network is characterized by comprising at least one wireless route and at least one mobile receiving end, and the specific detection method comprises the following steps:
A) when the data is sent by the wireless router, detecting the bandwidth by adopting a second frequency;
B) the wireless router can calculate the packet loss rate according to the information in the RTCP feedback packet;
C) smoothing the packet loss rate lambda through a filter, wherein lambda is a lambda + (1-a) b;
D) and when the data volume sent by the wireless router is less than 100Kb/s, detecting the bandwidth by adopting a first frequency, wherein the frequency of the first frequency is less than a second frequency.
2. The adaptive real-time detection method for the available bandwidth of the wireless network according to claim 1, wherein: the first frequency is specifically an≥a1(n ≧ 2), where n is the duration of the wireless route transmitting an amount of data less than 100Kb/s in units of s, anThe frequency is detected, and each term from the second term is not less than its previous term.
3. The adaptive real-time detection method for the available bandwidth of the wireless network according to claim 2, characterized in that: the second frequency is a decreasing formula opposite to the increasing formula, and is detected by adopting the second frequency when the data transmitted by the wireless route is more than 100 Kb/s.
4. The adaptive real-time detection method for the available bandwidth of the wireless network according to claim 1, wherein: in the step C, λ is the latest calculated packet loss ratio, b is the packet loss ratio currently in use, and a is the weight (0)<a<1) Setting two threshold values lambdac, lambada1According to the smoothed packet loss rate λ, three situations can be estimated.
5. The adaptive real-time detection method for the available bandwidth of the wireless network according to claim 4, wherein the three predicted situations are as follows:
when λ > λ c, the network is congested;
when lambda is<λ1When the network is idle;
when lambda is1＝<λ<At λ c, the network load is moderate.
6. The adaptive real-time detection method for the available bandwidth of the wireless network according to claim 5, wherein: let MaxRate be the maximum output bit rate of the transmitting end, MinRate be the minimum output bit rate of the transmitting end, Speed0 be the initial rate, Step be the linear increment of the rate, and beta be the multiplicative reduction factor.
7. The adaptive real-time detection method for the available bandwidth of the wireless network according to claim 6, wherein: the wireless routing initial rate Speed0 sends a data Speed 0; (MinRate is less than or equal to Speed is less than or equal to MaxRate).
8. The adaptive real-time detection method for the available bandwidth of the wireless network according to claim 7, wherein: and calculating the packet loss rate according to the information in the RTCP packet fed back by the mobile receiving terminal, and judging the network load and adjusting the output code rate after smoothing processing.
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| CN108965066A (en) * | 2018-10-17 | 2018-12-07 | 网宿科技股份有限公司 | The method and apparatus that a kind of pair of transmission path is detected |
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2020
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Patent Citations (6)
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| CN101753457A (en) * | 2009-12-24 | 2010-06-23 | 中国人民解放军理工大学指挥自动化学院 | The method and system of prediction internet end node available bandwidth of end-to-end route between |
| US20120002566A1 (en) * | 2010-06-30 | 2012-01-05 | Brother Kogyo Kabushiki Kaisha | Communication apparatus, communication method, and a computer-readable medium |
| CN103200621A (en) * | 2013-03-14 | 2013-07-10 | 南京理工大学 | Self-adaptation flow control method suitable for wireless projection system real-time data transmission |
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Application publication date: 20200911 |