CN1848999A

CN1848999A - Method for identifying flow bisness

Info

Publication number: CN1848999A
Application number: CNA2005100643558A
Authority: CN
Inventors: 张岩强; 许佰魁
Original assignee: Huawei Technologies Co Ltd
Current assignee: Global Innovation Polymerization LLC; Gw Partnership Co ltd
Priority date: 2005-04-14
Filing date: 2005-04-14
Publication date: 2006-10-18
Anticipated expiration: 2025-04-14
Also published as: CN100401842C

Abstract

A method for identifying stream service includes measuring through of LUps interface connected with core network by radio network controller then judging whether through of LUps interface is or not, confirming that current service is stream service if it is or otherwise confirming that current service is not stream service.

Description

The recognition methods that stream is professional

Technical field

The present invention relates to the 3-G (Generation Three mobile communication system) technical field of data transmission, be meant the recognition methods that stream is professional especially.

Background technology

The most significant new features of 3-G (Generation Three mobile communication system) are to support higher service bit rate, can be according to concrete service quality (the Quality of Service of business, QoS) require to distribute rational transmission bearer, to satisfy its corresponding qos requirement.Data transmission service in the 3G system can be divided into four types by qos requirement: session service, stream business, interactive service and background service.Wherein, session service requires to distribute certain transmission bandwidth, and the delay requirement height to transfer of data is mainly used in voice-bearer, video telephone etc.; Professional time delay and the transmission bandwidth to transfer of data of stream requires height, is mainly used in carrying streaming multimedia business; Interaction and background business are less demanding to time delay and transmission bandwidth, are mainly used in business such as bearer network page browsing, Email, background download.By above-mentioned four kinds of business features and their loaded service sources as can be known, the professional real-time of stream requires high, the requirement of guaranteed bandwidth.

Realize interaction or the background service in the above-mentioned business in the 3GPP agreement and flow professional basic network composition as shown in Figure 1, wherein, terminal links to each other with base station (NodeB) by eating dishes without rice or wine, and the radio network controller that links to each other with the base station (RNC) passes through Iu _PsInterface links to each other with the universal mobile telecommunications system core network, is connected on the internet by core network, and connects by internet and content server; By these connections, terminal just can be carried out alternately with content server, sets up the professional data of obtaining on the content server.

In the network of Fig. 1, interactive service and background service radio bearer set up flow process as shown in Figure 2, concrete steps are as follows:

Step 201, before terminal originating service request, need to activate PDP Context, promptly send the PDP context activation request to core net;

After step 202, core net receive the PDP context activation request of self terminal, can judge whether carry the QoS property parameters in this request, if the QoS property parameters is arranged, execution in step 204; Otherwise execution in step 203;

Step 203, core net are obtained the QoS property parameters of customization in the user signing contract information from attaching position register (HLR), execution in step 204 then;

Step 204, core net are handed down to RNC with the QoS property parameters when returning the PDP context activation request, RNC is that terminal is set up radio bearer according to this QoS property parameters then.

In the above-mentioned flow process, do not exist in the QoS property parameters of terminal to report or customization guaranteeing the requirement of bandwidth.But owing to all do not guarantee the requirement of bandwidth in interactive and the background service yet, so after the flow process in executing Fig. 2, if the business that terminal is initiated is interaction or background service, transport service on the radio bearer of just can be directly in above-mentioned steps 204, setting up.If but the business that terminal is initiated is the stream business, the stream business is the requirement of guaranteed bandwidth, directly the radio bearer of being set up according to the QoS property parameters of terminal to report or customization can not satisfy the professional transmission quality requirements of stream, so in the 3GPP agreement, done following regulation:

After the professional QoS property parameters of stream sends to terminal by the professional content server of stream, again by terminal notice core net; After core net obtains this QoS property parameters, this is flowed professional desired QoS property parameters again and send to RNC, RNC sets up radio bearer according to this QoS property parameters for this stream business again then.That flows professional radio bearer sets up flow process specifically as shown in Figure 3, and step is as follows:

Step 301, terminal send the stream business to the professional content server of stream and set up request message;

After step 302, content server are received this request message, and the Session Description Protocol that this stream is professional (Session Description Protocol, SDP) file is handed down to terminal, has comprised the professional QoS property parameters of stream in this document;

Step 303, terminal are analyzed SDP file, obtain QoS property parameters wherein, then this QoS property parameters are reported core net;

After step 304, core net are received the Qos parameter of terminal to report, issue the professional radio bearer of stream to RNC and set up request, notice RNC sets up radio bearer for the stream business, has comprised the professional QoS property parameters of stream in this request message;

Step 305, RNC know that the business that will carry out is that stream is professional, sets up radio bearer according to the qos parameter of stream business in this request for the stream business then after receiving that radio bearer that core net issues is set up request.

Flow process from Fig. 3 as can be seen, having stipulated in 3GPP terminal will have, SDP file has been analyzed, and the QoS property parameters after analyzing can be reported the function of core net, when the terminal that has only had this function flows business, can set up the radio bearer that is fit to according to the professional QoS property parameters of stream.But in the 3G of reality business, a lot of 3G terminal are functions of not supporting defined in the above-mentioned 3G agreement, and promptly terminal is not supported in the above-mentioned steps 303, and the SDP file that obtains is analyzed and QoS attribute parameter information wherein sent to core net; So also just can't execution in step 304 and 305, that is to say that it is professional that core net can not notify RNC to set up stream, can not send to RNC by the QoS property parameters that stream is professional, thus can't be for flowing the professional radio bearer that is fit to of setting up.

Though RNC can not rebulid a radio bearer for the business of flowing, but because the stream business nearly all is to set up on the basis of background service or interactive service, before stream business in execution graph 3 is set up flow process, terminal has been carried out the flow process among Fig. 2, RNC promptly set up radio bearer, so can carry out execution stream business on the radio bearer of having set up before the stream business for terminal.

But because the stream business is directly to carry out on the radio bearer for interaction or background service foundation, RNC is before the business of flowing, can not receive the professional radio bearer foundation of the stream request that issues from core net, can't know that the current business of transmitting is that stream is professional, RNC also can't obtain to flow professional QoS property parameters, because flowing in the QoS property parameters of professional radio bearer, actual bearer do not have the assurance bandwidth, when finding that network quality is bad, or Internet resources are when nervous, RNC will be to reducing the bandwidth of this radio bearer, even can directly discharge this business, the quality of convection current business has caused and has seriously influenced.

Summary of the invention

In view of this, the object of the present invention is to provide the professional recognition methods of stream, this method can identify stream as much as possible in universal mobile telecommunications system land radio access web (UTRAN) professional.

For achieving the above object, the invention provides four kinds of recognition methodss that stream is professional, describe respectively below.

First kind of professional recognition methods of stream provided by the invention comprises:

A, radio network controller are to its Iu that links to each other with core network _PsThe throughput of interface is measured;

B, judgement Iu _PsWhether the throughput of interface is stable, if throughput is stable, judging current business is that stream is professional; Otherwise judge current business is not that stream is professional.

Described judgement Iu _PsThe whether stable step of interface throughput can for:

Calculate Iu _PsThe mean value of interface throughput and variance, whether the ratio of judging the variance calculate and mean value then is less than predefined stable thresholding, if then throughput is stable; Otherwise, the throughput instability.

Preferably, the span of described stable thresholding is: 1/10 to 1/4.

Further, described judge current business and be the stream business after, can comprise:

According to Iu _PsThe throughput of interface is provided with the guarantee bandwidth for the professional radio bearer of this stream of transmission.

Second kind of professional recognition methods of stream provided by the invention comprises:

B, judgement Iu _PsWhether the throughput of interface is stable, and whether the upper layer application protocol of current business be Transmission Control Protocol, if throughput is stable and upper layer application protocol current business is not a Transmission Control Protocol, then judging current business is that stream is professional.

The professional recognition methods of the third stream provided by the invention comprises:

B, judgement Iu _PsWhether the throughput of interface is stable, and whether the upper layer application protocol of current business is Transmission Control Protocol, and whether the bandwidth of air-interface of the radio bearer of transmission current business is greater than Iu _PsIf the average throughput of interface is Iu _PsThe throughput of interface is stable, and the upper layer application protocol of current business is a Transmission Control Protocol, and the bandwidth of air-interface of the radio bearer of transmission current business is not more than Iu _PsThe average throughput of interface, then judging current business is that stream is professional.

The 4th kind of professional recognition methods of stream provided by the invention comprises:

B, judgement Iu _PsWhether the throughput of interface is stable, and whether the upper layer application protocol of current business is Transmission Control Protocol, and whether the bandwidth of air-interface of the radio bearer of transmission current business is greater than Iu _PsThe average throughput of interface, and whether the Radio Link cache size of transmission current business radio bearer is stable, if Iu _PsThe throughput of interface is stable, and the upper layer application protocol of current business is a Transmission Control Protocol, and the bandwidth of air-interface of the radio bearer of transmission current business is not more than Iu _PsThe average throughput of interface, and the Radio Link cache size instability of transmission current business radio bearer, then judging current business is that stream is professional.

The whether stable step of the Radio Link cache size of described judgement transmission current business radio bearer can for:

Calculate the mean value and the variance of Radio Link control cache size, whether the variance that judgement calculates and the ratio of mean value be less than predefined stable thresholding, if then Radio Link control cache size is stable; Otherwise Radio Link cache size instability.

As can be seen from the above technical solutions, among the present invention, by in radio network controller (RNC) to Iu _PsThe throughput of interface is measured, and whether throughput is stablized judged, judge current business if throughput is stable professional for stream, thereby knowledge has realized that identification stream is professional in UTRAN;

Also by in conjunction with whether being the judgement of Transmission Control Protocol, will cause the non-stream traffic identification of regime flow to come out among the present invention, increase the professional accuracy of identification stream by Transmission Control Protocol to upper layer application protocol;

And, also discern by judgement convection current business in conjunction with the relation of bandwidth of air-interface and average throughput, the non-stream traffic identification that not only with upper layer application protocol is TCP is come out, the stream business that also with upper layer application protocol is Transmission Control Protocol has also been discerned, and has further increased the professional accuracy of identification stream;

In addition, among the present invention,, be Transmission Control Protocol also with upper layer application protocol by in conjunction with judgement to the Radio Link cache size, bandwidth of air-interface is not more than the stream traffic identification of average throughput and comes out, and has further increased the professional accuracy of identification stream;

And then the present invention is by after identifying the stream business, according to Iu _PsThe throughput of interface is provided with the guarantee bandwidth for the radio bearer of transmission current business, has guaranteed the professional transmission quality of stream by this guarantee bandwidth.

Description of drawings

Fig. 1 is that network of the present invention is formed schematic diagram;

Fig. 2 is the flow chart of setting up of interactive service and background service radio bearer;

Fig. 3 sets up flow chart for the professional radio bearer of the stream of stipulating in the 3GPP agreement;

Fig. 4 is an overview flow chart of the present invention;

Fig. 5 is the flow chart of first embodiment of the invention;

Fig. 6 is the flow chart of second embodiment of the invention.

Embodiment

For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing.

Main thought of the present invention is, by at Iu _PsInterface is analyzed the feature of transfer of data, and whether determine the current business of transmitting is that stream is professional.Overview flow chart of the present invention as shown in Figure 4, concrete steps are as follows:

Step 401, the RNC couple Iu that links to each other with core network _PsThe throughput of interface is measured;

Step 402, judgement Iu _PsWhether the throughput of interface is stable, is that stream is professional if stabilize decision goes out current business; Otherwise judge current business is not that stream is professional.

In the present invention, can also in conjunction with whether being whether Transmission Control Protocol, bandwidth of air-interface be greater than Iu to the current business upper layer application protocol _PsThe throughput of interface, and the judgement of the Radio Link cache size of transmission current business have further increased the professional accuracy of identification stream.

Below the present invention will be described by specific embodiment.

In the step 204 in Fig. 2, core net can comprise maximum bandwidth in the QoS property parameters that RNC issues, this maximum bandwidth is exactly the utilizable maximum bandwidth of this radio bearer, and RNC is when setting up radio bearer, for the bandwidth of air-interface that this radio bearer distributed is generally this maximum bandwidth.Present embodiment carries out when the actual bandwidth of air-interface that is radio bearer distributed of RNC is utilizable maximum bandwidth, can increase the accuracy of measurement like this.And also can use the present invention, present embodiment when bandwidth of air-interface does not reach utilizable maximum bandwidth is a preferred embodiment.

The flow process of first embodiment of the invention as shown in Figure 5, concrete steps are as follows:

Step 501, RNC judge whether the employed bandwidth of air-interface of present wireless bearing is the utilizable maximum bandwidth of this radio bearer, if execution in step 502; Otherwise, repeat this step;

Step 502, startup Iu _PsThe throughput of interface is measured, and cycle statistics throughput measurement;

Throughput is in the radio bearer, receives all Service Data Units (SDU) bits (bit) number of core net (CN) in the unit interval, directly the Iu that links to each other with CN at RNC _PsProfessional speed is flowed in the also reflection most accurately the most directly perceived of interface statistics throughput; In this step, to Iu _PsThe throughput of interface is measured, and can realize by a throughput measurement module is set in RNC in advance, and after judging bandwidth of air-interface and being maximum bandwidth, the throughput measurement module is promptly at Iu _PsInterface is to measuring from Service Data Unit (SDU) bit number that core net received, and the bit number that receives in the unit of account time, obtain throughput measurement, the report cycle here can be between 100ms to 5000ms scope to RNC reporting measurement result the cycle then;

Step 503, RNC are according to throughput measurement, and statistics throughput mean value, and calculating variance judge according to throughput mean value and variance whether throughput is stable, then if throughput is stablized execution in step 504; Otherwise, illustrate that current business is not that stream is professional;

In this step, statistics throughput mean value and variance can be mean value and the variances in statistics cycle regular hour, this cycle can be selected between 100ms to 5000ms, and just this cycle is greater than the report cycle in the step 502, and for example measurement period is the integral multiple of report cycle; Whether stable method is specially to judge flow according to flow mean value and variance: preestablish a decision threshold that throughput is stable, this thresholding can be the ratio of variance and throughput, and concrete value can be in 1/10 to 1/4 scope; In this step, after the ratio of throughput mean value that calculates radio bearer and variance, judge whether this ratio stablizes decision threshold less than predefined throughput,, illustrate that then current throughput is stable if less than this thresholding; Otherwise, current throughput instability is described;

After judging the throughput instability,, not that stream is professional so just can judge this business because the professional transmission of stream is stable.And if throughput is stable, can not conclude directly that but this business flows business exactly, because throughput is stable, also may cause owing to the adaptive bandwidth characteristic of Transmission Control Protocol, so also need further to judge, promptly execution in step 504; The adaptive bandwidth of Transmission Control Protocol is meant if application layer uses Transmission Control Protocol to carry out data packet transmission, the bandwidth that this agreement will be adjusted to throughput the use that makes this radio bearer automatically be that the bandwidth of air-interface that this radio bearer distributed is consistent;

Step 504, RNC judge whether institute's data packets for transmission is Transmission Control Protocol in the applied agreement of application layer in this radio bearer, if Transmission Control Protocol, execution in step 505; Otherwise can judge this business is that stream is professional;

In this step, be Transmission Control Protocol if judge packet in the applied agreement of application layer, then stable throughput because the professional characteristic of stream causes, also may be because the bandwidth self-adaption characteristic of Transmission Control Protocol causes not necessarily; And if judge the applied agreement of application layer is not Transmission Control Protocol, as Real-time Transport Protocol and udp protocol etc., because the professional obviously stable throughput that can not cause of non-stream, so, throughput caused by the professional transmission characteristic of stream if stablizing can judge basically;

Step 505, judge present wireless bearing bandwidth of air-interface whether greater than throughput, if judge bandwidth of air-interface greater than throughput, it is professional then to judge this business and be stream; Otherwise this business is not that stream is professional;

Because in step 504, determined that throughput is stable, and the agreement that application layer adopts is a Transmission Control Protocol, because the adaptive characteristic of Transmission Control Protocol is to make throughput be adapted to bandwidth of air-interface, so if throughput equals bandwidth of air-interface, then can judge stable throughput and be cause by Transmission Control Protocol rather than cause by stream is professional; If bandwidth of air-interface, illustrates then that throughput is not adaptive to bandwidth of air-interface greater than throughput, cause by stream is professional so stable throughput at this moment occurs, so the business that can judge in the radio bearer to be transmitted is professional for stream; In addition, the bandwidth of air-interface described in this step equals throughput and is meant and is substantially equal to, and promptly differ situation seldom, for example, the difference of bandwidth of air-interface and throughput is then set bandwidth of air-interface and equaled throughput below 1/5; Otherwise, if both differences greater than 1/5 explanation both are unequal.

Whether more than is the explanation to the first embodiment of the present invention, by the judgement in conjunction with throughput and the used agreement of application layer, be that the stream business is discerned to the business of being transmitted in the radio bearer in first embodiment.Among first embodiment, use Transmission Control Protocol in application layer, throughput is stablized and throughput equals under the situation of bandwidth of air-interface substantially, the business of transmitting with regard to judging in the radio bearer is that stream is professional, but under these circumstances, also exist the throughput of the professional transmission of stream just to equal bandwidth of air-interface, in order to address this problem, Transmission Control Protocol and stream business have been carried out further analysis, draw by analysis, if because the throughput that Transmission Control Protocol causes is stable, Radio Link control cache size (RLC buffer) is stable; And if owing to be that the professional throughput that causes of stream is stable, even application layer applied be Transmission Control Protocol, RLC buffer also is unsettled.So in the second embodiment of the present invention, RLCbuffer is judged, below is described.

The flow process of second embodiment of the invention as shown in Figure 6, wherein step 601 is basic identical to step 505 to the step 501 of step 605 and first embodiment, after just judging bandwidth of air-interface in step 605 and being not more than throughput, further comprises:

Step 606, judge that radio bearer RLC buffer is whether stable,, illustrate that then stable throughput is because Transmission Control Protocol causes, so that current business is not a stream is professional if RLC buffer is stable; Otherwise, illustrate that stable throughput causes owing to stream is professional, so current business is the stream business;

In this step, judge the whether stable method of RLC buffer can for: set in advance RLCbuffer and stablize thresholding, this threshold value can RLC buffer variance and the ratio of RLC buffer mean value, to stablize thresholding the same with throughput, RLC buffer stablize thresholding also can be between 1/10 to 1/4 value, judge then whether the ratio of RLC buffer variance and RLC buffer mean value stablizes thresholding less than predefined RLC buffer, if less than this thresholding then illustrate that RLC buffer is stable; Otherwise RLC buffer instability is described.

In above two embodiment, after judging current business and being the stream business, can further include: for the radio bearer of current transport stream business is provided with the guarantee bandwidth, this occurrence that ensures bandwidth is according to Iu in RNC _PsThe throughput of interface is set and can be equal to or slightly greater than current throughput.For example be provided with the guarantee bandwidth, measuring current throughput is 128Kbit/ second, can be 144Kbit/ second with bandwidth settings then.After being provided with the guarantee bandwidth, when the Radio Resource anxiety, when RNC need reduce the bandwidth of some radio bearer, owing to, the bandwidth of air-interface of this radio bearer can be reduced to below the guarantee bandwidth for this radio bearer is provided with the guarantee bandwidth.

Because whether the professional judgement of stream is judged according to transmission characteristic, when firm transport service, can will should business be that the stream business judges just, and because stream is professional when just beginning to transmit, Iu _PsThe throughput of interface is not subjected to the restriction of Radio Resource condition, is greater than the professional real assurance bandwidth of stream, so be Iu with the guarantee bandwidth settings of radio bearer here _PsThe throughput of interface has just guaranteed that this guarantee bandwidth greater than the professional bandwidth that guarantees of real stream, so RNC controls according to this guarantee bandwidth, makes the bandwidth of air-interface of the radio bearer of transport stream business be not less than the guarantee bandwidth, just can satisfy the professional requirement of stream.

More than be explanation, in concrete implementation process, can carry out suitable improvement, to adapt to the concrete needs of concrete condition method of the present invention to the specific embodiment of the invention.Therefore be appreciated that according to the specific embodiment of the present invention just to play an exemplary role, not in order to restriction protection scope of the present invention.

Claims

1, a kind of recognition methods of the business of flowing is characterized in that this method comprises:

2, method according to claim 1 is characterized in that, described judgement Iu _PsWhether stable step is interface throughput:

3, method according to claim 2 is characterized in that, the span of described stable thresholding is: 1/10 to 1/4.

4, according to arbitrary described method in the claim 1 to 3, it is characterized in that, described judge current business and be the stream business after, further comprise:

5, a kind of recognition methods of the business of flowing is characterized in that this method comprises:

6, method according to claim 5 is characterized in that, described judgement Iu _PsWhether stable step is interface throughput:

7, according to claim 5 or 6 described methods, it is characterized in that, described judge current business and be the stream business after, further comprise:

8, a kind of recognition methods of the business of flowing is characterized in that this method comprises:

9, method according to claim 8 is characterized in that, described judgement Iu _PsWhether stable step is interface throughput:

10, according to Claim 8 or 9 described methods, it is characterized in that, described judge current business and be the stream business after, further comprise:

11, a kind of recognition methods of the business of flowing is characterized in that this method comprises:

12, method according to claim 11 is characterized in that, described judgement Iu _PsWhether stable step is interface throughput:

13, method according to claim 12 is characterized in that, whether stable step is the Radio Link cache size of described judgement transmission current business radio bearer:

14, according to arbitrary described method in the claim 11 to 13, it is characterized in that, described judge current business and be the stream business after, further comprise: