CN104184788B - Dynamic QoS mapping method between a kind of heterogeneous network - Google Patents
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Abstract
The present invention relates to QoS mapping methods dynamic between a kind of heterogeneous network, the following steps are included: requiring carry out business classification according to the different qos parameter of various businesses, and high, normal, basic three sub- grades are divided into the QoS index of every class business, respectively correspond the upper limit of QoS of survice parameter space, average and lower limit；The QoS grade for needing to map is determined according to the load condition of target network, realizes that dynamic QoS of the business in target network is mapped apart from decision algorithm using space vector；When network load changes, the two-way adjustment of Mobile state is mapped into the QoS of existing business using the second level sequence based on the sub- grade of QoS of survice and priority.The present invention can make the QoS of business be protected and network idle when promoted business QoS ensure, improve network resource utilization.
Description
Technical field
The present invention relates to the converged network technologies of Cellular Networks and WLAN in information technology field, more particularly to a kind of different
Dynamic QoS mapping method between network forming network.
Background technique
In recent years, with the rapid development of intelligent multimode terminal, explosive growth is presented in the flow of wireless data service,
Lead to that the network capacity pressure of original Cellular Networks is huge and costly, speed is slow, on the other hand, user is to different business
Demand for services is also more and more diversified, and different network access techniques is in power system capacity, coverage area, data rate, mobility
Tenability, rate etc. respectively have length, are only unable to satisfy above-mentioned all users to industry by the transmission network of monotechnics
The demand of business, it is therefore desirable to the demand of multiplicity of subscriber is realized by the fusion of a variety of Radio Access Networks.Cellular Networks covering
Range is wide, quality of service is secure, but transmission bandwidth is limited, and WLAN have it is at low cost, coverage area is small, and transmission bandwidth is high
Feature, two networks can covering, quality of service, bandwidth and in terms of realize complementary, Cellular Networks and wlan network
Fusion faster, more flexible mobile data services can be provided for user.
3GPP defines 6 kinds of scenes to Cellular Networks and wlan network fusion, and wherein first three scene has had comparison clear
Technology, current research emphasis concentrates on scene 4 and scene 5, i.e., customer service when heterogeneous network switches business it is continuous
Property and seamless switching.In order to make customer service, its QoS is protected in end-to-end communication and handoff procedure in heterogeneous network, just
It needs the qos parameter of all kinds of business that can be transmitted in switching target network, i.e., to have reflecting for the qos parameter of a set of heterogeneous network
Penetrate mechanism.
Traditional mapping mode mainly includes based on mapping table and based on the mapping of function/formula at present, but these are mapped
Method one side mapping granule is relatively thicker (the mapping table mapping such as based on heterogeneous networks QoS classification), is on the other hand substantially
Belong to static mapping scheme between particular network, once that is, business establishes connection, the QoS mapping relations of business will not be according to net
The real-time change of network carries out dynamic adjustment to the QOS mapping relations heterogeneous network, is unfavorable for the reasonable benefit of Internet resources in this way
With.
There are two types of isomery/converged network qos parameter mapping modes general at present:
(1) it chooses a baseline network to be mapped, that is, the opposite suitable QoS classification of granularity of division is chosen, with it
Based on, by the different QoS classification of other networks according to the QoS such as time delay, delay variation, packet loss characteristic parameter one by one with selection
Baseline network QoS classification mapped；Error is cumulative caused by this mapping method is understood because of multiple mapping, increases quality of service
The uncertainty of offer；
(2) QoS formulated between a set of heterogeneous networks maps uniform rules, establishes towards different types of business
Diffsery/Intsery, UMTS network, IP network and the internetwork unified mapping table of IEEE802.11, according to unified mapping table
Realize the mapping two-by-two between heterogeneous network；This mapping method mapping form is more complicated, and mapping mode is fixed, not clever enough
It is living, dynamic adjustment cannot be carried out according to QoS mapping relations of the specific network state real-time change to heterogeneous network.
In addition in bibliography [Misun Ryu, Youngmin Kim, HongshikPark.Systematic QoS
Class Mapping Framework over Multiple Heterogeneous Networks.Proc
NEW2AN2008.St.Petersburg, Russia, 2008,5174:212-221] in, author proposes a kind of based on ASM industry
The QoS mapping mechanism for coordinate diagram of being engaged in, i.e., be mapped in ASM coordinate diagram according to two attributes of the time delay of applied business and packet loss,
And the mapping of target network QoS business classification is carried out apart from judgement method using space vector, which provides one kind
Fine-grained QoS mapping mechanism based on business, does not need to establish mapping table in advance, is not in multiple mapping and causes to add up
Error, but still the static mappings of particular network QoS classification can only be carried out；In bibliography [in Liu Lu isomery/converged network
Research Ph.D. Dissertation Beijing University of Post & Telecommunication on June 11st, 2010 of end-to-end quality of service control and management] in, Zuo Zheti
A kind of dynamic QoS mapping method based on mapping table is gone out, this method is needed based on initial mapping table, i.e. service access/switching
It is based on the static mappings table when to target network, still there may be multiple mappings to cause add up error, and in addition its QoS joins
The dynamic adjustment of number mapping only carries out QoS grade in network congestion and adjusts grade, has lacked two-way Regulation mechanism, in network
Internet resources can not be made to be fully used when idle.
Summary of the invention
Technical problem to be solved by the invention is to provide QoS mapping methods dynamic between a kind of heterogeneous network, in network
Under the premise of the QoS of business is protected when busy, network idle when promoted business QoS ensure, improve Internet resources
Utilization rate.
The technical solution adopted by the present invention to solve the technical problems is: dynamic QoS reflects between providing a kind of heterogeneous network
Shooting method, comprising the following steps:
(1) carry out business classification is required according to the different qos parameter of various businesses, and the QoS index of every class business is drawn
It is divided into high, normal, basic three sub- grades, respectively corresponds the upper limit of QoS of survice parameter space, average and lower limit；
(2) the QoS grade for needing to map is determined according to the load condition of target network, is adjudicated using space vector distance
Algorithm come realize business in target network dynamic QoS mapping；
(3) when network load changes, using the second level sequence based on the sub- grade of QoS of survice and priority to existing
The QoS of business is mapped into the two-way adjustment of Mobile state.
Using the load according to target network to be accessed in the step (2), by high load threshold with setting and low
Load threshold compares, and determines the QoS grade for needing to map, when target network load is lower than low-load threshold value, all kinds of business
QoS map and mapped toward high sub- grade；When target network load is higher than high liabilities threshold value, the QoS mapping of all kinds of business
It is mapped toward low sub- grade；When target network load is higher than low-load threshold value, is lower than high load threshold, all kinds of business
QoS is mapped to be mapped toward neutron grade.
It, cannot if current network load is higher than high load threshold in the step (3) when network load changes
When meeting all Business Stream connections, the degradation adjustment of QoS grade is carried out to existing business, according to first to high QoS grade
Business degrades, and same QoS grade is adjusted according to the sequence of service priority from low to high, and guarantee to degrade at first is
The business that QoS grade is highest and service priority is minimum, and re-start business in target network the mapping of QoS class and
Resource allocation, until the business or network load of no adjustable QoS grade drop to high load threshold or less；If worked as
Preceding network load is lower than low-load threshold value, when not being able to satisfy all Business Stream connections, in order to make Internet resources obtain abundant benefit
With carrying out the upgrading adjustment of QoS grade, according to first upgrading to low QoS grade business, same QoS to existing business
Sub- grade is adjusted according to service priority sequence from high to low, and guarantee to upgrade at first is that QoS is elementary and business
The business of highest priority, and re-start the mapping and resource allocation of business QoS class in target network, until can not be with
The business or network load for adjusting QoS grade are raised to low-load threshold value or more；If current network load is in low-load threshold
Between value and high load threshold, then do not need to do any processing.
The qos parameter includes time delay and packet loss, but is not limited to the two parameters.
Beneficial effect
Due to the adoption of the above technical solution, compared with prior art, the present invention having the following advantages that and actively imitating
Fruit:
It the composite can be widely applied to the following converged wireless network communications field, based on delineation of activities QoS grade
On the basis of, support the dynamic mapping that QoS is carried out according to the load condition of target network, and when network load changes, adopt
The two-way adjustment of Mobile state is mapped into the QoS of business with the second level sequence based on the sub- grade of QoS of survice and priority, in this way in mesh
When mark network load is lower, access service can obtain higher QoS, and Internet resources is made to be fully used, negative in target network
When carrying higher, while ensureing existing QoS of survice, it is able to achieve service access target networks more as far as possible, improves Internet resources
Utilization rate improves the utilization rate of Internet resources, promotes the matter of customer service to realize while QoS of survice is protected
Amount.
Detailed description of the invention
Fig. 1 is applied business map reference figure；
Fig. 2 is the QoS mapping flow chart of target network Added Business；
Fig. 3 is the QoS mapping dynamic adjustment flow chart that target network has business；
Fig. 4 is the isomery converged wireless network environment map being made of in embodiment WCDMA network and wlan network.
Specific embodiment
Present invention will be further explained below with reference to specific examples.It should be understood that these embodiments are merely to illustrate the present invention
Rather than it limits the scope of the invention.In addition, it should also be understood that, after reading the content taught by the present invention, those skilled in the art
Member can make various changes or modifications the present invention, and such equivalent forms equally fall within the application the appended claims and limited
Range.
Embodiments of the present invention are related to dynamic QoS mapping method between a kind of heterogeneous network, comprising the following steps: according to
The different qos parameter of various businesses requires carry out business classification, and is divided into high, normal, basic three sons to the QoS index of every class business
Grade respectively corresponds the upper limit of QoS of survice parameter space, average and lower limit；Needs are determined according to the load condition of target network
The QoS grade of mapping realizes that dynamic QoS of the business in target network is mapped apart from decision algorithm using space vector；
When network load changes, the QoS of existing business is reflected using the second level sequence based on the sub- grade of QoS of survice and priority
Inject the two-way adjustment of Mobile state.In this way can make the QoS of business be protected and network idle when promote business
QoS is ensured, improves network resource utilization.
Firstly, Application ServiceMap (ASM) is mapped according to attributes such as the time delay of applied business and packet loss
Onto ASM coordinate diagram, each service application has oneself location information (LI, a Location in ASM
Information).By taking time delay and packet loss bidimensional coordinate diagram as an example, packet loss is divided into four grades, and time delay is divided into 16 etc.
The value of grade, LI arrives (3,15) from (0,0), and every class business as shown in Figure 1 has corresponding position section in the coordinate diagram.
On this basis, the qos parameter locational space of every class business is divided into high, normal, basic three sub- grades, respectively corresponds this
The upper limit of class QoS of survice parameter space, average and lower limit.Such as VOIP business, it is divided into according to the height of qos requirement
QoShigh_VOIP、QoSmid_VOIP、QoSlowTri- sub- grades of _ VOIP.Wherein, for the purpose of every sub- grade of class delineation of activities
It is that can be mapped according to the corresponding QoS of the load dynamic micro-adjustments of network its business in QoS mapping mechanism below.
Secondly, being linked into target network in new business or needing to carry out from other network switchings to target network heterogeneous network
QoS mapping when, first according to the load of target network to be accessed, pass through load threshold with setting (including high load threshold
LoadhighWith low-load threshold value Loadlow) relatively determine that the business needs the QoS grade mapped (when network load is very low, to reflect
It is mapped to high QoS grade, low QoS grade is mapped on the contrary, also can guarantee while to make full use of Internet resources
Quality of service), recycle space vector to be mapped to the target network that distance needs the QoS rank mapped nearest apart from judgement method
QoS class is mapped, and process flow is as shown in Figure 2.When target network load is lower than low-load threshold value, all kinds of business
QoS is mapped to be mapped toward high sub- grade；When target network load is higher than high liabilities threshold value, the QoS of all kinds of business maps past
Low sub- grade is mapped；When target network load is higher than low-load threshold value, is lower than high load threshold, the QoS of all kinds of business
It maps and is mapped toward neutron grade.Wherein mapping mode is to realize business in target apart from decision algorithm using space vector
Dynamic QoS mapping in network.Space vector distance judgement method specific formula can with bibliography [Misun Ryu,
Youngmin Kim,Hongshik Park.Systematic QoS Class Mapping Framework over
Multiple Heterogeneous Networks.Proc NEW2AN2008.St.Petersburg,Russia,2008,
5174:212-221]。
In addition, when detecting that network load changes and is more than certain threshold range, using based on QoS of survice etc.
Grade and priority second level sequence the two-way adjustment of Mobile state is mapped into the QoS of existing business, reach reasonable distribution Internet resources,
Improve the purpose of resource utilization.As shown in figure 3, dividing following several situations to handle:
(1) if current network load is very high (to be higher than Loadhigh), when not being able to satisfy all Business Stream connections, at this time
Downgrade processing is carried out to QoS grade according to sequence described below to existing business, and re-starts business in target network
The mapping and resource allocation of middle QoS class, until the business or network load of no adjustable QoS grade drop to specified threshold
It is worth (Loadhigh) below.Carry out QoS grade degrade adjustment when, according to first degrading to high QoS grade business,
Same QoS grade is adjusted according to the sequence of service priority from low to high, and guarantee to degrade at first is that QoS grade is highest
And the business that service priority is minimum；
(2) if current network load is very low (to be lower than Loadlow), at this time to existing business according to sequence described below
Upgrading processing is carried out to QoS grade, and re-starts the mapping and resource allocation of business QoS class in target network, until
The business or network load for not having adjustable QoS grade are raised to specified threshold (Loadlow) more than.Carrying out QoS etc.
Grade degrade adjustment when, according to first degrading to low QoS grade business, same QoS grade according to service priority from
High to Low sequence adjustment, guarantee to upgrade at first is that QoS is elementary and the highest business of service priority.
(3) if current network load is in LoadlowAnd LoadhighBetween, then it does not need to do any processing.
Now by taking the isomery converged wireless network that WCDMA network and wlan network form as an example, application of the invention is carried out
It is described in detail, which includes Radio Access Network, core net and data services network composition, and wireless network is by one
The base station WCDMA and a WLAN access point composition, core net includes SGSN, TTG, GGSN etc., whole network environment such as Fig. 4 institute
Show.
In network environment above, the scene of setting are as follows: user initiates video traffic by mobile terminal, ceaselessly slowly
Speed is walked up and down along the direction of arrow meaning in Fig. 4, and for data service, default is accessed using wlan network, in addition WLAN
Being supported between 20%-90% for network changes at random.
User along arrow direction is walked up and down in Fig. 4 when, can ceaselessly pass through WLAN coverage domain, use at this time
Family business can be switched to wlan network, can switch back into UMTS network again after leaving the region WLAN, such customer service can be in UMTS
Ceaselessly switch between network and wlan network, while after user enters the region WLAN, since the load of wlan network also exists
Do not stop to change, the mechanism mentioned according to this patent, user is when passing through WLAN access service, corresponding QoS mapping relations meeting
It is adjusted according to the network load of WLAN.
According to network scenarios and implementation process above, it can be found that terminal traffic is passed through between UMTS and wlan network
Repeatedly after switching, although qos parameter have passed through multiple mapping, but still still can be mapped to original QoS class of service, no
It can be because of the cumulative uncertainty for causing quality of service to provide of error；In addition compared with traditional static mappings mechanism,
When the free time of the network WLAN (when loading lower), the QoS of customer service is improved, and the utilization rate of wlan network bandwidth is mentioned
Height, when wlan network is busy and the effect of static mappings mechanism is almost the same.
Claims (3)
1. dynamic QoS mapping method between a kind of heterogeneous network, which comprises the following steps:
(1) carry out business classification is required according to the different qos parameter of various businesses, and the QoS index of every class business is divided into
High, normal, basic three sub- grades respectively correspond the upper limit of QoS of survice parameter space, average and lower limit；
(2) the QoS grade for needing to map is determined according to the load condition of target network, using space vector apart from decision algorithm
To realize dynamic QoS mapping of the business in target network；
(3) it when network load changes, is sorted using the second level based on the sub- grade of QoS of survice and priority to existing business
QoS be mapped into the two-way adjustment of Mobile state；Specifically: if current network load is higher than high load threshold, is not able to satisfy all
Business Stream connection when, QoS grade is carried out to existing business and is degraded adjustment, according to first being carried out to high QoS grade business
Degrade, same QoS grade is adjusted according to the sequence of service priority from low to high, and guarantee to degrade at first is QoS grade
Highest and minimum service priority business, and the mapping and resource allocation of business QoS class in target network are re-started,
Until the business or network load of no adjustable QoS grade drop to high load threshold or less；If current network is negative
It carries and is lower than low-load threshold value, when not being able to satisfy all Business Stream connections, the upgrading adjustment of QoS grade is carried out to existing business,
According to first upgrading to low QoS grade business, sequence tune of the same QoS grade according to service priority from high to low
Whole, guarantee to upgrade at first is that QoS is elementary and the highest business of service priority, and re-starts business in target
The mapping and resource allocation of QoS class in network, until the business or network load of no adjustable QoS grade be raised to it is low
It is more than load threshold；If current network load between low-load threshold value and high load threshold, does not need to do any processing.
2. dynamic QoS mapping method between heterogeneous network according to claim 1, which is characterized in that in the step (2)
It determines and needs by the high load threshold and low-load threshold value comparison with setting using the load according to target network to be accessed
The QoS grade of mapping, when target network load is lower than low-load threshold value, the QoS of all kinds of business maps grading toward high son etc.
Row mapping；When target network load is higher than high load threshold, the QoS of all kinds of business is mapped to be mapped toward low sub- grade；?
When target network load is higher than low-load threshold value, is lower than high load threshold, the QoS of all kinds of business is mapped to be reflected toward neutron grade
It penetrates.
3. dynamic QoS mapping method between heterogeneous network according to claim 1, which is characterized in that the qos parameter packet
Include time delay and packet loss.
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| CN101640952A (en) * | 2009-08-31 | 2010-02-03 | 北京邮电大学 | System for realizing heterogeneous network QoS dynamic mapping and method thereof |
| CN103209186A (en) * | 2013-04-08 | 2013-07-17 | 浪潮电子信息产业股份有限公司 | Design method for ensuring quality of service of businesses in heterogeneous network |
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| CN101640952A (en) * | 2009-08-31 | 2010-02-03 | 北京邮电大学 | System for realizing heterogeneous network QoS dynamic mapping and method thereof |
| CN103209186A (en) * | 2013-04-08 | 2013-07-17 | 浪潮电子信息产业股份有限公司 | Design method for ensuring quality of service of businesses in heterogeneous network |
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