CN101087217A - Network frequency width monitoring adjustment system - Google Patents

Abstract

The invention discloses a network monitor system, especially a monitor adjusting system for network bandwidth, which includes pocket loss rate and packet delay mutation value JITIER, and it is defined in control information of RTCP which accord with RFC 3550 standard, which correspond with rich region A, optimal bandwidth region B and congestion region C; when packet delay mutation value JITIER is rich region A when without obvious rising; when the packet delay mutation value JITIER starts to rising, but the packet loss rate without obvious variation, and it is the optimal bandwidth region B; when the packet delay mutation value JITIER and packet loss rate are rising, it is the congestion region C; and rich region A, optimal bandwidth region B and congestion region C are distinguished by the packet delay mutation value JITIER and packet loss rate,which can get the optimal bandwidth region B by positive prediction, and it can reduce the risk of lost, and improve the transmission quality of network.

Description

Network frequency width monitoring adjustment system

Technical field

The present invention relates to a kind of network monitoring system, particularly about a kind of network frequency width monitoring adjustment system.

Background technology

The modern times that science and technology is flourishing; network is just as being the nerve on the human body; the every organ reaction of inside of human body is chained together; also because so; network is in transmission course; the situation that is easy to packet loss takes place; mainly contain the reason that three kinds of network package are lost, first kind: general packet loss, because of network is to belong to unreliable transmission; so package might be lost in the process of transmission; the normal probability of general packet loss still still need be according to the ability of apparatus for network node about 1% ~ 5%, and the probability that the equipment that ability is strong is more lost relatively is just low more; on the contrary, the weak more equipment packet loss of ability is also just high more.Second kind: frequency range deficiency, network similarly are water pipe, and so-called flow size is arranged, if having the actual data quantity transmitted of wanting of duty-cycle of one section node little in the path of transmission, those data will be abandoned because of frequency range is not enough.The third: compete mutually to lose,, the possibility of the frequency range of competing is just arranged, cause the loss of packet data if import two data at one time.

Several adapt to unreliable transmission beneath network blockage or congestion control mechanism and have proposition at present, below are now than main stream approach:

● TCP-Like rate controlled (TCP-Like Rate Control):

After calculating, parameters such as the RTT of general reference use TCP and Packet lose finish the behavior that congested control and package resend.Though can reach flow control, have the promptness problem excessive to exist, and have compatible problem such as ROUTER and NAT with postponing change.

● the friendly rate controlled (TCP-Friendly Rate Control (TFRC)) of TCP:

Use the congestion control mechanism of similar TCP to be implemented on the RTP, its parameter must exist in the same package with PLAYLOAD (transmission data), so the HEADER of RTP can change to some extent to meet the calculating of TCP, because the RTT time must be to be as the criterion the time with this actual transmissions package, cannot separately test, therefore have the problem of the 5th layer of transport protocol compatibility.

● data congestion control protocol (Datagram Congestion Control Protocol (DCCP)):

The data congestion control protocol can't be learnt the network congestion situation and designs at UDP.Take into account real-time and network congestion repayment mechanism simultaneously.At present still in the rough draft stage, and incompatible in UDP.

In view of this, above-mentioned prior art all has with network now has compatible problem to exist, and the present invention proposes a kind of and the network frequency width monitoring adjustment system of host-host protocol compatibility now, is present in these disappearances of the prior art with solution.

Summary of the invention

Main purpose of the present invention provides a kind of network frequency width monitoring adjustment system, it is that the package that sees through RTCP inside postpones variation value JITTER repayment mechanism collocation packet loss, initiatively predict best frequency range district B, effectively reduce the loss rate of network package, the quality of Network Transmission more can further be promoted.

Another object of the present invention is a kind of network frequency width monitoring adjustment system that is compatible with under the procotol now providing, its mode conformance with standard RFC3550.The shortest data that just can upgrade a RTCP at 50ms postpone variation value JITTER mean variation amount Jave to obtain best average package, and then improve the accuracy that package postpones variation value JITTER.

Another purpose of the present invention is that a kind of network frequency width monitoring adjustment system is being provided, image or sound will distortions after packet data is lost, so we will just know the correction frequency range after passive package moves mistake in a large number, be converted to the initiatively role of prediction, the data volume of avoiding transmitting surpasses the load of real network.

In order to achieve the above object, the present invention discloses a kind of network monitoring system, especially refer to a kind of network frequency width monitoring adjustment system, comprise that the packet loss package of arranging in pairs or groups postpones variation value JITTER and is defined in the extra control information of a RTCP, and meet up-to-date RFC 3550 standards, corresponding with abundant district A, best frequency range district B and congested district C respectively; When package postpones variation value JITTER and packet loss and all do not have obvious rising is abundant regional A; Begin to rise when package postpones variation value JITTER, but be best frequency range district B when packet loss and no change; When package postpones variation value JITTER and packet loss and all rises is congested district C; Distinguish this abundant district A, this best frequency range district B and these three zones of congested district C with package delay variation value JITTER and packet loss at last, and then initiatively obtain best frequency range district B, see through prediction and obtain best frequency range district B, can reduce the risk of packet loss, improve the network quality.

Below cooperate appended graphic explanation in detail by specific embodiment, when the purpose that is easier to understand the present invention, technology contents, characteristics and the effect that reached thereof.

The accompanying drawing simple declaration

Fig. 1 is actual amount of data/time of delay of the present invention and volume of transmitted data coordinate diagram;

Fig. 2 is packet loss of the present invention and volume of transmitted data coordinate diagram;

Fig. 3 postpones variation value JITTER and volume of transmitted data coordinate diagram for package of the present invention.

Embodiment

Can more manifest for ease of the further feature content of understanding the present invention and advantage and the effect that reached thereof, with network frequency width monitoring adjustment system conjunction with figs. of the present invention, be described in detail as follows now:

Now see also Fig. 1, Fig. 1 is package delay variation value JITTER of the present invention and volume of transmitted data coordinate diagram for actual amount of data/time of delay of the present invention and volume of transmitted data coordinate diagram, Fig. 2 for packet loss of the present invention and volume of transmitted data coordinate diagram and Fig. 3.As shown in the figure, we are divided into an abundant district A with a network bandwidth 10 (not shown)s, one best frequency range district B and three sections of a congested district C, abundant district A represents frequency range also quite abundant, data volume can also up promote, best frequency range district B is represented as present best frequency range, congested district C represents areas of congestion, be easy to have the danger of data loss, again in the extra control information of real time control protocol RTCP (real-time control protocol), there is a package to postpone variation value JITTER repayment mechanism, its package postpones the generation of variation value JITTER, exactly because the delay that network competition (package transmits at one time) is caused down, JITTER is low more for this package delay variation value, the expression network has the situation of competing of looking younger to take place, the situation of packet loss also can reduce, the quality of network is also good more, JITTER is high more but package postpones the variation value, situation takes place to compete mutually in expression network often, the situation of packet loss also can improve, the quality of network is also poor more relatively, meeting under the RFC3550 standard, the shortest 50ms just can upgrade the data of a RTCP, to improve the accuracy of data, and packet loss also has certain standard value, when surpassing the standard value of packet loss, image and sound will begin distortion, so we will just know the correction frequency range after passive package moves mistake in a large number, are converted to initiatively prediction, the data volume of avoiding transmitting surpasses the load of real network, and causes the loss of packet data.When again, package postpones that variation value JITTER and this packet loss all do not have obvious rising is abundant district A; Begin to rise when package postpones variation value JITTER, but be best frequency range district B when packet loss and no change; When package postpones variation value JITTER and this packet loss and all rises simultaneously is congested district C, therefore postpone variation value JITTER this packet loss of arranging in pairs or groups with package, distinguish abundant district A, best frequency range district B and three zones of congested district C, and then initiatively obtain best frequency range district B, and be compatible with the RFC3550 standard.The mode that obtains best frequency range district B postpones the variance criteria value for a package of getting earlier, and method is:

A. obtain the mean variation amount Jave that nearest plurality of packets postpones variation value JITTER earlier

B. do not have under the obvious rising in this packet loss, find out minimum value Jmin and maximum Jmax that this package postpones variation value JITTER

C. should the best frequency range district B package postpone variation value JITTER Jmax-Jave value and Jmax-(2 * Jave) be worth between.

This package of abundant again district A postpones variation value JITTER can be less than Jmax-(2 * Jave) values, and this package of congested district C postpones variation value JITTER can be greater than the Jmax-Jave value, package postpones the minimum value Jmin of variation value JITTER, maximum Jmax and mean variation amount Jave value can be according to this network conditions at that time and are produced change, to reach best Expected Results, and by Fig. 1, Fig. 2, Fig. 3 learns, the position of best frequency range is after package begins to lose, because postponing the change meeting of variation value JITTER, package before best frequency range, just begins to have tangible rising, thus, we just can see through package and postpone variation value JITTER does active to the data that transmit prediction, before overloading, just reduce the transmission quantity of data, avoid the loss of packet data when Network Transmission, further improve the transmission quality of network.

The present invention discloses a kind of network monitoring system, especially refer to a kind of network frequency width monitoring adjustment system, comprise that a packet loss and a package postpone variation value JITTER and be defined in the extra control information of a RTCP, and meet up-to-date RFC 3550 standards, corresponding with abundant district A, best frequency range district B and congested district C respectively; When package postpones variation value JITTER and packet loss and all do not have obvious rising is abundant regional A; Begin to rise when package postpones variation value JITTER, but be best frequency range district B when packet loss and no change; When package postpones variation value JITTER and packet loss and all rises is congested district C; Distinguish this abundant district A, this best frequency range district B and these three zones of congested district C with package delay variation value JITTER and packet loss at last, and then initiatively obtain best frequency range district B, reduce the risk of packet loss,, can be applied to widely on the network equipment to improve the network quality.

In sum, the present invention has reached the effect that institute's desire is promoted really under breakthrough prior art structure, and the also non-easy full of beard of those of ordinary skill institute of being familiar with this technology reaches.

Above-described embodiment only is technological thought and the characteristics for explanation the present invention, its purpose makes the those of ordinary skill of being familiar with this skill can understand appearance and enforcement according to this within the present invention, when can not with qualification the present invention's claim scope, promptly equivalent variations or the modification of doing according to disclosed spirit generally must be encompassed in the present invention's the appended claims.

The critical piece label declaration

10 network bandwidths

The abundant district of A

The best frequency range of B district

The congested district of C

Claims (10)

1. a network frequency width monitoring adjustment system comprises a network bandwidth, and this network bandwidth is divided into an abundant district A, a best frequency range district B and three sections of a congested district C; It is characterized in that, also comprise:

One packet loss and a package postpone variation value JITTER, and they are defined in the extra control information of a RTCP, and meet newest standards RFC 3550, and be corresponding with this abundant district A, this best frequency range district B and this congested district C respectively; When this package postpones that variation value JITTER does not have obvious rising with this packet loss is this abundant district A; Begin to rise when this package postpones variation value JITTER, but be this best frequency range district B when this packet loss and no change; When this package postpones that variation value JITTER rises with this packet loss is this congested district C; And

Postpone variation value JITTER this packet loss of arranging in pairs or groups with this package, distinguish this abundant district A, this best frequency range district B and these three zones of congested district C, and then initiatively obtain best frequency range district B, be applied to widely on the network equipment, and meet the latest network standard.

2. network frequency width monitoring adjustment system as claimed in claim 1 is characterized in that, the generation that this package postpones variation value JITTER is exactly because the delay that network competition (package transmits at one time) is caused down.

3. network frequency width monitoring adjustment system as claimed in claim 1, it is characterized in that, JITTER is low more for this package delay variation value, the situation of competing of looking younger the expression network takes place, the situation of packet loss also can reduce, JITTER is high more for this package delay variation value, and situation takes place to compete mutually the expression network often, and the situation of packet loss also can improve.

4. network frequency width monitoring adjustment system as claimed in claim 1 is characterized in that, is meeting under the RFC3550 standard, and the shortest 50ms just can upgrade the data of a RTCP, improves the accuracy of data.

5. a mode that obtains best frequency range district B is characterized in that, comprises:

A. obtain the mean variation amount Jave that nearest plurality of packets postpones variation value JITTER earlier;

B. do not have under the obvious rising in this packet loss, find out minimum value Jmin and maximum Jmax that this package postpones variation value JITTER;

C. this package that should the best frequency range district B postpones variation value JITTER between Jmax-Jave value and Jmax-(2xJave) are worth.

6. as claim 1 or 5 described network frequency width monitoring adjustment systems, it is characterized in that this package of this abundant district A postpones variation value JITTER and is worth less than Jmax-(2xJave).

7. as claim 1 or 5 described network frequency width monitoring adjustment systems, it is characterized in that this package of this congested district C postpones variation value JITTER greater than the Jmax-Jave value.

8. as claim the 1 or 5 described network frequency width monitoring adjustment systems, it is characterized in that the minimum value Jmin that this package postpones variation value JITTER can produce change according to this network condition at that time, to reach best Expected Results.

9. as claim 1 or 5 described network frequency width monitoring adjustment systems, it is characterized in that the maximum Jmax that this package postpones variation value JITTER can produce change according to this network condition at that time, to reach best Expected Results.

10. as claim the 1 or 5 described network frequency width monitoring adjustment systems, it is characterized in that the mean variation amount Jave value that this package postpones variation value JITTER can produce change according to this network condition at that time, to reach best Expected Results.

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