CN101166175A - A stream class service acceptance algorithm - Google Patents
A stream class service acceptance algorithm Download PDFInfo
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- CN101166175A CN101166175A CNA2006101405941A CN200610140594A CN101166175A CN 101166175 A CN101166175 A CN 101166175A CN A2006101405941 A CNA2006101405941 A CN A2006101405941A CN 200610140594 A CN200610140594 A CN 200610140594A CN 101166175 A CN101166175 A CN 101166175A
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Abstract
First, the method carries out conventional judgment by using admission algorithm based on wireless resources, and then carries out algorithmic judgment based on resources of fixed network for service in stream type entered the admission algorithm already. The method includes steps: (1) calculating total bandwidth of service in conversation type with maximal bit rate; then, calculating total bandwidth SBW of the service in stream type after admission; (2) determining whether the said service in stream type preempts resources of the service in conversation type currently; if yes, then rejecting admission; otherwise, continuing; (3) calculating maximal connected number of user STypeUENum, and current already admitted total number of service in stream type SUENum; if SUENum is larger than and equal to STypeUENum, then admission is rejected, and admission flow is ended; otherwise, admitting the service in stream type, and ended. The invention prevents fixed network from congestion.
Description
Technical field
The present invention relates to Wideband Code Division Multiple Access (WCDMA) (Wideband Code Division Multiple Access is hereinafter to be referred as WCDMA) system, and be particularly related to the stream class service acceptance algorithm of a kind of WCDMA under the limited situation of transmission bandwidth.
Background technology
The admittance of the business of WCDMA system will be restricted by series of factors such as interference, power, sign indicating number resource, for example, for the 12.2k session service, only consider wireless network environment and sign indicating number utilization of resources situation, when the user when equidistantly distributing, the limit in mean number of users is 91, and when being evenly distributed, limit number of users is 52.Professional for 64k stream, when equidistantly distributing, limit number of users is 15, and when being evenly distributed, limit number of users is 10.For the 64k interaction service, when equidistantly distributing, limit number of users is 21, and when being evenly distributed, limit number of users is 13.For the 144k stream class service, equidistantly distribute 7 users of maximum supports, when being evenly distributed, limit number of users is 4.For the 144k interaction service, equidistantly distribute 9 users of maximum supports, when being evenly distributed, limit number of users is 6.
The analysis of these data all is based on wireless channel and the sign indicating number utilization of resources is carried out, in WCDMA wireless system shown in Figure 1, business datum is at subscriber equipment (User Equipment, hereinafter to be referred as UE), transmit between B node (hereinafter to be referred as NodeB) and the radio network controller (Radio NetworkController is hereinafter to be referred as RNC), wherein, be wireless channel between UE and the NodeB, transmit for fixed network between NodeB and the RNC.Operator is when system realizes, and the form of renting existing telecommunication line is often adopted in the network planning between NodeB and the RNC, promptly rents 2～3 E1 transmission lines, and one of them E1 transmission line bandwidth is 2.048M.Learn that from last surface analysis if a NodeB only serves a sub-district, and carrier frequency is at 1 o'clock, for the 12.2k session service, total descending occupied bandwidth number is 91*12.2k=1.11M, and so, the bandwidth constraints between NodeB and the RNC can not cause too big influence to existing equipment.But, if adopt three sectors, 2 carrier frequency allocation plans, only simple speech business, the limit total bandwidth that NodeB will bear just reaches 6M, therefore, the access customer number that draws based on the admission control algorithm of cell capacity of original employing is just greater than the limit on transmission bandwidth between NodeB and the RNC.And operator is from control operating cost angle, the unlikely unrestricted transmission bandwidth that increases between NodeB and the RNC, can reasonably rent the circuit of certain bandwidth according to the traffic model of current region, under most of situation, the fixed network bandwidth resources can satisfy demand for services, still, and when network burst service peak, such as situations such as festivals or holidays, the congestion phenomenon that causes owing to the resource-constrained reason of fixed network will appear.Therefore, must carry out suitable improvement to original acceptance algorithm based on idle wireless resource, be that constraints is by fixed network resource and Radio Resource decision (R, P), R represents the set of Radio Resource relevant parameter in the formula, P is the set of fixed network resource related parameters, and the fixed network here mainly refers to the network between NodeB and the RNC.
Summary of the invention
The objective of the invention is provides a kind of WCDMA stream class service acceptance algorithm under the limited situation of transmission bandwidth in order to overcome the congestion phenomenon that causes owing to the resource-constrained reason of fixed network, has improved service quality.
A kind of stream class service acceptance algorithm of the present invention at first carries out the conventional acceptance algorithm judgement based on Radio Resource, if interactive class and background business, just direct process ends; If session service just directly enters session service and admits, then process ends; If stream class service then enters acceptance algorithm, it is carried out algorithmic decision based on the fixed network resource, above-mentioned acceptance algorithm may further comprise the steps:
Step 1 is calculated the maximum bit speed of session service total bandwidth CHoldBW, then calculates and admits the back stream class service to take total bandwidth SBW;
Step 2, take total bandwidth SBW according to stream class service after bandwidth PVCBW total between the maximum bit speed total bandwidth CHoldBW of above-mentioned session service and B node and the radio network controller and the above-mentioned admittance, judge whether the admittance of above-mentioned stream class service seizes current sessions class service resources; If SBW＞PVCBW-CHoldBW, i.e. current sessions class service resources is seized in the admittance of stream class service, excludes so, admits flow process to finish, if SBW＜PVCBW-CHoldBW continues following steps;
Step 3 is calculated maximum access customer number STypeUENum and the current stream class service sum SUENum that has admitted;
Step 4 if above-mentioned SUENum＞=STypeUENum excludes so, admits flow process to finish; Otherwise, allow stream class service acceptance, admit flow process to finish.
The maximum bit speed of described session service total bandwidth
Wherein CTypeUENum is the session service number, and MaxBitRate assigns maximum rate for the session service RAB.
The described total bandwidth that takies of admitting all stream class services that value that the back stream class service takies total bandwidth SBW existed for the assurance bit speed (Guaranteed Bit Rate is hereinafter to be referred as GBR) of the stream class service that needs to admit adds.
The described maximum calculation process of number of users STypeUENum of admitting is as follows:
A), try to achieve the professional equivalent user of the equivalent conversation class 12.2k that in Internet resources, can hold and count CTypeUENum according to total bandwidth PVCBW between above-mentioned B node and the radio network controller;
B), obtain the current region traffic model according to B node region type;
C) according to the equivalent coefficient of various different business, stream class service is converted equivalent 12.2k number of channel SChEquNum, stream class service adopts PS 64K channel and PS 128k channel as converting standard;
D) calculate SChEquNum ' according to the above-mentioned CTypeUENum and the above-mentioned SChEquNum that obtain;
E) according to current business zone traffic model homogeneous turbulence business proportion not, release the professional actual permission of all kinds of streams and insert number STypeUENum;
F) above-mentioned STypeUENum can be configured on the backstage according to current network planning.
For a class dense city, the equivalent coefficient of above-mentioned PS 64k is 4.5, and the equivalent coefficient of above-mentioned PS 128k is 5.33, so above-mentioned SChEquNum=34.82, i.e. and equivalence becomes the 12.2k business, and stream class service can be admitted 34.82 business at most.
According to above-mentioned CTypeUENum and above-mentioned SChEquNum and utilize formula S ChEquNum '=CTypeUENum * (SChEquNum/248), obtain SChEquNum '; Work as PVCBW=3000k, CTypeUENum=245.9 so, calculating SChEquNum '=34.52,248 at last is that conversion obtains a class dense city according to sign indicating number resource distribution situation; All business are converted 12.2k, the traffic carrying capacity that can hold.
Adopt algorithm of the present invention, under the limited situation of Network Transmission between NodeB and the RNC, the constraint that acceptance judging is added Internet resources between NodeB and the RNC, this algorithm does not surpass maximum access customer number STypeUENum and does not seize current sessions class service resources yet, can effectively avoid the congested of fixed network transmission, improve service quality.
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail.For those skilled in the art that, from detailed description of the invention, above-mentioned and other purposes of the present invention, feature and advantage will be apparent.
Description of drawings
Fig. 1 WCDMA wireless access system schematic diagram.
The stream class of Fig. 2 one embodiment of the invention is based on the acceptance algorithm of fixed network bandwidth constraints.
The algorithm embodiment schematic flow sheet of Fig. 3 one embodiment of the invention.
Embodiment
Please refer to Fig. 3, this figure is the algorithm embodiment schematic flow sheet of one embodiment of the invention.Be described in further detail below in conjunction with 3 pairs of one embodiment of the invention of accompanying drawing:
At first carry out type of service and judge, promptly at first carry out conventional acceptance algorithm judgement based on Radio Resource, if interactive class and background business, just direct process ends; If session service just directly enters session service and admits, then process ends; If stream class service then carries out the algorithmic decision based on the fixed network bandwidth resources.When carrying out above-mentioned algorithmic decision based on the fixed network bandwidth resources, the stream class that promptly enters the described one embodiment of the invention of Fig. 2 allows to enter acceptance algorithm based on the admittance module in the acceptance algorithm of fixed network bandwidth constraints.
As shown in Figure 2, above-mentioned acceptance algorithm comprises following process:
At first, calculate the maximum bit speed of session service total bandwidth CHoldBW, the maximum bit speed of described session service total bandwidth
Wherein CTypeUENum is the session service number, and MaxBitRate assigns maximum rate for the session service RAB.
Then, calculate admittance back stream class service and take total bandwidth SBW; The described total bandwidth that takies of admitting all stream class services that value that the back stream class service takies total bandwidth SBW existed for the assurance bit speed (Guaranteed Bit Rate is hereinafter to be referred as GBR) of the stream class service that needs to admit adds.
Take total bandwidth SBW according to stream class service after bandwidth PVCBW total between the maximum bit speed total bandwidth CHoldBW of above-mentioned session service and B node and the radio network controller and the above-mentioned admittance, judge whether the admittance of above-mentioned stream class service seizes current sessions class service resources; If SBW＞PVCBW-CHoldBW, i.e. current sessions class service resources is seized in the admittance of stream class service, excludes so, admits flow process to finish.
If SBW＜PVCBW-CHoldBW continues following process;
Calculate maximum access customer number STypeUENum and the current stream class service sum SUENum that has admitted;
The described maximum calculation process of number of users STypeUENum of admitting is as follows:
1), tries to achieve the professional equivalent user of the equivalent conversation class 12.2k that in Internet resources, can hold and count CTypeUENum according to bandwidth PVCBW total between above-mentioned NodeB and the RNC;
2), obtain the current region traffic model according to NodeB region type AreaType;
3) according to the equivalent coefficient of various different business, according to table 1, the stream business is converted equivalent 12.2k number of channel SChEquNum, professional PS 64K channel and the PS 128k channel of adopting of stream is as converting standard, and for example for a class dense city, the equivalent coefficient of PS 64k is 4.5, the equivalent coefficient of PS 128k is 5.33, SChEquNum=34.82 so, i.e. equivalence becomes the 12.2k business, and stream class service can be admitted 34.82 business at most.
4) calculate SChEquNum '=CTypeUENum * (SChEquNum/248) according to the above-mentioned CTypeUENum that obtains and above-mentioned SChEquNum, suppose PVCBW=3000k, CTypeUENum=245.9 so, calculate SChEquNum '=34.52 at last, 248 be a class dense city according to sign indicating number resource distribution situation, obtain by the conversion of all types of service of table 1 a class dense city.All business are converted 12.2k, the traffic carrying capacity that can hold
Table 1 is according to traffic model zones of different traffic carrying capacity allocation table
| Area type | CS?12.2k | ?CS?64k | ?PS?64k | ?PS?128k | ?PS?384k |
| One class dense city | 140 | ?8 | ?3 | ?4 | ?1 |
| Two class dense cities | 132 | ?5 | ?4 | ?6 | ?1 |
| The general city of one class | 116 | ?5 | ?4 | ?8 | ?1 |
| The general city of two classes | 124 | ?4 | ?5 | ?7 | ?1 |
| The general city of three classes | 124 | ?4 | ?5 | ?7 | ?1 |
| Small towns, one class suburb | 164 | ?3 | ?2 | ?4 | ?1 |
| Small towns, two class suburbs | 164 | ?3 | ?2 | ?4 | ?1 |
| The rural area | 224 | ?3 | ?1 | ?1 | ?0 |
| Equivalent coefficient | 1 | ?4.5 | ?4.5 | ?533 | ?12 |
5) 64k: 128k=3: 4, STypeUENum=10 promptly according to current business zone traffic model homogeneous turbulence business proportion not, releases the professional actual permission of all kinds of streams and inserts number STypeUENum;
Above-mentioned STypeUENum can be configured on the backstage according to current network planning;
If above-mentioned SUENum＞=STypeUENum excludes so, admit flow process to finish; Otherwise, allow stream class service acceptance, admit flow process to finish.Carry out as can be seen stream class service admittance on be limited to STypeUENum.
What need mention is, because on the allocated bandwidth strategy, to above-mentioned interaction service and background business, take according to the maximum capacity distribution principle, therefore, do not need to carry out extra process, when normal admittance strategy is handled interactive class of admittance or background business,, so just can not be that interactive class or background business distribute the PVCBW resource if the PVCBW resource is not enough, this type of business is to the insensitive class business of time delay, can not cause very big influence.
In sum, when this method is adjudicated at business admission, not only need to consider wireless network resource, also need to consider the fixed network resource, by adding fixed network resource constraint condition in based on the acceptance algorithm of Radio Resource traditional, reduced because the congestion condition of fixed network when resource-constrained improved professional service quality.
Certainly; the present invention also can have other embodiment; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of claim of the present invention.
Claims (6)
1. a stream class service acceptance algorithm at first carries out the conventional acceptance algorithm judgement based on Radio Resource, if interactive class and background business, just direct process ends; If session service just directly enters session service and admits, then process ends; If stream class service then enters acceptance algorithm, it is carried out algorithmic decision based on the fixed network resource, above-mentioned acceptance algorithm may further comprise the steps at least:
Step 1 is calculated the maximum bit speed of session service total bandwidth CHoldBW, then calculates and admits the back stream class service to take total bandwidth SBW;
Step 2, according to total bandwidth PVCBW between the maximum bit speed total bandwidth CHoldBW of above-mentioned session service and B node and the radio network controller, and stream class service takies total bandwidth SBW after the above-mentioned admittance, judges whether the admittance of above-mentioned stream class service seizes current sessions class service resources; If SBW＞PVCBW-CHoldBW, i.e. current sessions class service resources is seized in the admittance of stream class service, excludes so, admits flow process to finish, if SBW＜PVCBW-CHoldBW continues following steps;
Step 3 is calculated maximum access customer number STypeUENum and the current stream class service sum SUENum that has admitted;
Step 4 if above-mentioned SUENum＞=STypeUENum excludes so, admits flow process to finish; Otherwise, allow stream class service acceptance, admit flow process to finish.
2. stream class service acceptance algorithm according to claim 1 is characterized in that, the maximum bit speed of described session service total bandwidth
Wherein CTypeUENum is the session service number, and MaxBitRate assigns maximum rate for the session service RAB.
3. stream class service acceptance algorithm according to claim 1 is characterized in that, the described total bandwidth that takies of admitting all stream class services that value that the back stream class service takies total bandwidth SBW existed for the assurance bit speed of the stream class service that needs to admit adds.
4. stream class service acceptance algorithm according to claim 1 is characterized in that, the described maximum calculation process of number of users STypeUENum of admitting is as follows:
A), try to achieve the professional equivalent user of the equivalent conversation class 12.2k that in Internet resources, can hold and count CTypeUENum according to total bandwidth PVCBW between above-mentioned B node and the radio network controller;
B), obtain the current region traffic model according to B node region type;
C) according to the equivalent coefficient of various different business, stream class service is converted equivalent 12.2k number of channel SChEquNum, stream class service adopts PS 64K channel and PS 128k channel as converting standard;
D) calculate SChEquNum ' according to the above-mentioned CTypeUENum and the above-mentioned SChEquNum that obtain;
E) according to current business zone traffic model homogeneous turbulence business proportion not, release the professional actual permission of all kinds of streams and insert number STypeUENum;
F) planning is configured on the backstage above-mentioned STypeUENum according to current network.
5. stream class service acceptance algorithm according to claim 4, it is characterized in that, for a class dense city, the equivalent coefficient of above-mentioned PS 64k is 4.5, the equivalent coefficient of above-mentioned PS 128k is 5.33, so above-mentioned SChEquNum=34.82, i.e. equivalence becomes the 12.2k business, and stream class service can be admitted 34.82 business at most.
6. stream class service acceptance algorithm according to claim 5, it is characterized in that, according to above-mentioned CTypeUENum and above-mentioned SChEquNum and utilize formula S ChEquNum '=CTypeUENum * (SChEquNum/248), obtain SChEquNum ', wherein 248 is that conversion obtains a class dense city according to sign indicating number resource distribution situation; All business are converted 12.2k, the traffic carrying capacity that can hold.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103517090A (en) * | 2013-07-11 | 2014-01-15 | 国家广播电影电视总局广播科学研究院 | Method for measuring and calculating network flows |
| CN104301922A (en) * | 2013-07-16 | 2015-01-21 | 中国移动通信集团公司 | Method and system for evaluating access capability of network |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103517090A (en) * | 2013-07-11 | 2014-01-15 | 国家广播电影电视总局广播科学研究院 | Method for measuring and calculating network flows |
| CN103517090B (en) * | 2013-07-11 | 2016-11-23 | 国家广播电影电视总局广播科学研究院 | The measuring method of network traffics |
| CN104301922A (en) * | 2013-07-16 | 2015-01-21 | 中国移动通信集团公司 | Method and system for evaluating access capability of network |
| CN104301922B (en) * | 2013-07-16 | 2018-02-23 | 中国移动通信集团公司 | A kind of method and system for the access capability for assessing network |
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Open date: 20080423 |