CN102045776A - Adaptive traffic stream switching method for communication network system and corresponding server - Google Patents
Adaptive traffic stream switching method for communication network system and corresponding server Download PDFInfo
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Abstract
The invention provides an adaptive traffic stream switching method. For each multi-interface terminal, the method comprises the following steps that: 1) a traffic stream switching management server periodically acquires current user information and current link state of the multi-interface terminal; 2) the traffic stream switching management server establishes judgment matrixes respectively on the basis of an analytic hierarchy process, and calculates the comprehensive satisfaction of all the interfaces of the multi-interface terminal; 3) all the traffic streams are ranged into a preswitched queue from high to low according to traffic priority, and all the interfaces are ranged into an interface queue from high to low according to the comprehensive satisfaction of the interfaces; 4) mapping of all the traffic streams and all the interfaces are established to form a matching relation; and 5) traffic stream switching is preformed according to the matching relation. By the method, the communication performance of all current network interfaces can be accurately responded, the cost of user sides cannot be obviously increased, and the requirements of users are fully considered when the quality of service (QOS) of all the traffic streams is guaranteed. In the method, mobile scenes are supported, and non-mobile scenes are also supported.
Description
Technical field
The present invention relates to the distribution of traffic flows technical field, specifically, the present invention relates to a kind of self-adapted service stream switching method and corresponding business stream handover management server that is used for communications network system.
Background technology
Next-generation communication network will be the complete IP network that plurality of access modes merges, and the characteristics of this mixture of networks, isomery are for the application of many interface terminations provides wide prospect.Multiple interfaces that many interface terminations are integrated can use multiple cable resource, Radio Resource to carry out the Business Stream transmission simultaneously.3G even back 3G epoch have been arrived, multiple system is also deposited, TD-SCDMA, WCDMA, CDMA2000, LTE etc. may be present in the network of one or more operators simultaneously, and the also constantly development of many interface terminations of supporting multiple standard simultaneously, this switching problem between each interfaces of many interface terminations just occurred.
The switching that current many interface terminations are supported can realize with the interface to be the switching of granularity and to be the switching of granularity with stream.Be that the switching of granularity makes and has application that different service quality requires originally and be bundled in together and switch with the interface, all switch to optimum oneself network interface and get on thereby can't make each use.And be that the switching of granularity can be avoided the problems referred to above with stream.
At present, be that the interface handover scheme of granularity is mostly initiated by terminal with stream, this makes terminal increase a large amount of expenses beyond proper communication.
The patent application CN200910083521.7 of Inst. of Computing Techn. Academia Sinica has proposed multi-interface service flow switching method and the device in a kind of mobile communication system, it be a kind of under the proxy mobile IPv 6 environment users trigger flow of business changing method and device.The patent application 200910087426.4 that Huawei Tech Co., Ltd proposes has proposed a kind ofly to support the user to trigger service flow switching method, system and the network equipment with network-triggered under the proxy mobile IPv 6 environment simultaneously.Above-mentioned two patents are and relate to the intelligent handover decision algorithm of carrying out switch decision according to the multiple factors such as characteristics, current link circuit condition and other user's requests of different kinds of business stream, therefore are difficult to Business Stream reasonably is assigned on the different network interface of terminal.
In addition, above-mentioned stream handoff technique is all only supported mobile scene, is in the many interface terminations under the non-moving scene, can't enjoy the service that Business Stream switches.
Therefore, current press for a kind of can both support to move also support non-moving scene, and can reasonably be assigned to self-adapted service stream switching method and corresponding business stream handover management server on the different network interface of terminal to Business Stream according to the multiple factors such as characteristics, current link circuit condition and other user's requests of different kinds of business stream.
Summary of the invention
The purpose of this invention is to provide and a kind ofly both supported mobile scene also to support non-moving scene, can reasonably be assigned to self-adapted service stream switching method and corresponding business stream handover management server on the different network interface of terminal to Business Stream according to the multiple factors such as characteristics, current link circuit condition and other user's requests of different kinds of business stream.
For achieving the above object, the invention provides a kind of self-adapted service stream switching method, relate to Business Stream handover management server and many interface terminations, described self-adapted service stream switching method comprises:
For each many interface termination, carry out the following step:
1) described Business Stream handover management server periodically obtains the active user's information and the current link circuit condition of these many interface terminations;
2) described Business Stream handover management server is set up judgment matrix respectively based on analytic hierarchy process (AHP), and calculates the comprehensive satisfaction of each interface of these many interface terminations; Wherein, with the general objective of interface synthesis satisfaction, with active user's information and current link circuit condition partial objectives for, with each usable interfaces of described many interface terminations possibility as solution layer as rule layer as destination layer;
3) according to service priority order from high to low each Business Stream is arranged formation pre-switch formation, each interface arrangement is formed interface queue according to interface synthesis satisfaction order from high to low;
4), each Business Stream and each interface are set up mapping formation matching relationship according to pre-switch formation and interface queue;
5) Business Stream handover management server is carried out the Business Stream switching according to described mapping relations on many interface terminations.
Wherein, described user profile comprises interface type.
Wherein, described link circuit condition comprises interface load, available bandwidth and the indication of received signal intensity.
Wherein, in the described step 1), the interface type of each many interface terminations, interface load, available bandwidth and the indication of received signal intensity are obtained from network terminal by Business Stream handover management server.
Wherein, described link circuit condition also comprises packet loss.
Wherein, described step 1) also comprises following substep:
11) after many interface terminations are connected into the territory, local, initiate registration to Business Stream handover management server, carry user profile in the registration message, described user profile comprises priority option, and this priority option is represented the priority of the specified services stream that the user is can be in communication process explicit;
12) Business Stream handover management server is incited somebody to action wherein user profile preservation after receiving registration message;
13) many interface terminations are periodically to Business Stream handover management server transmit status updating message; Carry current user profile in the state updating message;
14) Business Stream handover management server upgrades active user's information according to the state updating message.
Wherein, described communications network system is operated in mobile scene following time, described step 11)～14) in, the Business Stream handover management server that described Business Stream handover management server is the territory, local;
Described step 1) comprises that also the foreign lands Business Stream handover management server of access was periodically added up current link circuit condition, and sends to the Business Stream handover management server in territory, local when step 15) was worked as terminal and moved on to foreign lands from being connected into the territory;
Described step 2)～5), the Business Stream handover management server that described Business Stream handover management server is the territory, local.
Wherein, the total interface of described many interface terminations all is a wave point; Perhaps existing wave point has wireline interface again; Perhaps total interface all is wired.
Wherein, when having wireline interface in described many interface terminations, wireline interface is given virtual received signal intensity indication, and this virtual received signal intensity indication is according to the maximum virtual received signal intensity indication assignment of wave point.
Wherein, described step 4) comprises following substep:
41) if the pre-switch formation is empty, then leap to step 5), otherwise, enter step 42);
42) described Business Stream handover management server takes out the head of the queue business from the pre-switch formation, takes out the head of the queue interface from interface queue, and the Business Stream and the interface that are taken out are set up mapping;
43) if interface queue is empty, then enter step 44), otherwise, jump to step 41);
44) each interface is joined the team again according to current comprehensive satisfaction height order.
Wherein, described step 5) comprises following substep:
51) described Business Stream handover management server is carried out at local terminal and is switched, and downstream service flow is switched on the matched interfaces;
52) described Business Stream handover management server sends the Business Stream switching command to terminal, and the switch unit of terminal receives instruction and carries out switching command, finishes the switching of uplink service stream.
The present invention also provides a kind of Business Stream handover management server, comprising:
Statistic unit is used for periodically obtaining the active user's information and the current link circuit condition of these many interface terminations;
The Business Stream recognition unit is used to obtain the service priority of each Business Stream of each many interface termination;
The switch decision unit is used for setting up judgment matrix respectively according to analytic hierarchy process (AHP), and calculates the comprehensive satisfaction of each interface of these many interface terminations; Wherein, with the general objective of interface synthesis satisfaction, with active user's information and current link circuit condition partial objectives for, with each usable interfaces of described many interface terminations possibility as solution layer as rule layer as destination layer; Also be used for each Business Stream being arranged formation pre-switch formation, each interface arrangement formed interface queue according to interface synthesis satisfaction order from high to low according to service priority order from high to low; According to pre-switch formation and interface queue, each Business Stream and each interface are set up mapping formation matching relationship;
Switch performance element, be used on many interface terminations, carrying out Business Stream and switch according to described matching relationship.
Compared with prior art, the present invention has following technique effect:
1, switch decision of the present invention partly carries out in network side server end self adaptation, and the overhead of user side is very little.
2, the present invention can react the communication performance of current each network interface accurately, and this all is very important for the work quality and the user satisfaction that improve server end.
3, the present invention can carry out switch decision to the priority level initializing situation of each Business Stream according to the user when guaranteeing each Business Stream QOS, fully takes into account user's demand.
4, the present invention had both supported mobile scene, also supported non-moving scene, can combine and carry out corresponding deployment neatly with existing standard.
Description of drawings
Fig. 1 is the self-adapted service stream switching method flow chart of one embodiment of the invention;
Fig. 2 is applied to schematic diagram under the non-moving scene for the present invention;
Fig. 3 is applied to schematic diagram under the mobile scene for the present invention;
Fig. 4 is the stream switched system schematic diagram of one embodiment of the invention.
Embodiment
In order to make method of the present invention, technical scheme clearer,, a kind of self-adapted service stream switching method of the present invention and system are further described in detail below in conjunction with drawings and Examples.Should be noted that embodiment described herein only is used for better explaining the present invention, and be not used in qualification the present invention.
Embodiment 1
According to embodiments of the invention 1, a kind of self-adapted service stream switching method is provided, its flow process comprises the following steps: with reference to figure 1
Step S100, Business Stream handover management server press some cycles and upgrade the service flow management table.Business Stream handover management server is in conjunction with the service flow management table, at each many interface termination, difference analysis user information and current link circuit condition, promptly Business Stream handover management server periodically obtains the active user's information and the current link circuit condition of each many interface termination.
Above-mentioned service flow management table list item form is as shown in table 1:
Table 1
| Source address | Destination address | Source port number | The destination slogan | Traffic flow types | Priority | The tunnel call number |
The specifying information of every Business Stream of described service flow management table record.Every corresponding list item of Business Stream, wherein the identification of traffic flow types can be adopted conventional stream recognition method (such as Layer 7 identifications), and present embodiment does not limit the concrete grammar of stream identification.Traffic flow types can be set to video, audio frequency, text etc., and wherein the tunnel call number is represented which bar tunnel of the current correspondence of this Business Stream.
User profile comprises following content:
(1) interface type: interface is wired or wireless;
(2) Interface status: interface can be used or be unavailable;
Current link circuit condition comprises following content:
(1) interface load: the link load of current each interface of reflection user;
(2) available bandwidth: current each interface available bandwidth of reflection user;
(3) received signal intensity indication (RSSI): the signal strength signal intensity of this parameter reflection user current wireless interface;
(4) packet loss: the packet drop of current each interface of reflection.
Step S200, for each many interface termination, described Business Stream handover management server is set up judgment matrix respectively based on analytic hierarchy process (AHP).Described analytic hierarchy process (AHP) (Analytic Hierarchy Process, AHP) be a kind of policy-making thought method, basic thought is that complicated problems is resolved into some levels and some key elements, between each key element, compare simply, judge and calculate, to obtain the weight of different key elements and different alternatives.Because its simplification and accuracy are widely used in the every field such as economy, the energy, management.Therefore be fit to very much solve exist under the situation of a plurality of alternatives, draw the decision problem of optimal solution.
Described judgment matrix comprises two kinds, and first kind of judgment matrix represents that respectively the value of considering is about the mutual comparison of general objective, and second kind of judgment matrix represents that each network interface is about the respectively mutual comparison of the value of considering;
According to the AHP method, each element a in first kind of judgment matrix wherein
IjRepresentative is with respect to general objective, the value of considering a
iWith respect to the value of considering a
jRelative Link Importance; The value of considering is the partial objectives in the AHP algorithm.Each element p in second kind of judgment matrix
IjRepresentative is with respect to the value of considering a, interface p
iWith interface p
jRelatively value, wherein, judge that yardstick can be by following principle value:
(1) 1: for c, q
iAnd q
jOf equal importance;
(2) 2: for c, q
iCompare q
jBetween of equal importance and important a little;
(3) 3: for c, q
iCompare q
jImportant a little;
(4) 5: for c, q
iCompare q
jImportant;
(5) 7: for c, q
iCompare q
jImportant is many;
(6) 9: for c, q
iCompare q
jDefinitely important.
Such as, if q
iCompare q
jImportant, q then
Ij=5, otherwise, if q
jCompare q
iImportant, q then
Ij=1/q
Ji=1/5, in like manner, if a
iCompare a
jImportant, a then
Ij=5, otherwise, if a
jCompare a
iImportant, a then
Ij=1/a
Ji=1/5, in like manner, if p
iCompare p
jImportant, p then
Ij=5, otherwise, if p
jCompare p
iImportant, p then
Ij=1/p
Ji=1/5.Though have only 1,2,3,5,7,9 several values in the above-mentioned value principle, one skilled in the art will readily appreciate that the value that other can be set according to actual needs.
Above-mentioned general objective is meant the communication environment quality of current network interface, and the value of considering is meant current interface type, interface load, available bandwidth, packet loss, RSSI (indication of received signal intensity).Table 2 has provided the example of first kind of judgment matrix value in the present embodiment, but the value of first kind of judgment matrix is not limited to table 2, and this is that those skilled in the art are understandable.
Table 2
Wherein, A represents interface communication performance, C
1Represent interface type, C
2Represent interface load, C
3Represent available bandwidth, C
4Represent packet loss, C
5Represent RSSI.
Especially, in some cases, can only use interface type, interface load, available bandwidth, four parameters of RSSI as the value of considering.Like this, among the step S100, Business Stream handover management server can directly obtain the real-time update of all values of considering from network terminal.And user side only needs to carry out some basic Signalling exchange work (user terminal under the mobile scene originally also all needs Signalling exchange), just make that also user side is communicated by letter normally beyond, can not increase a large amount of expenses because of self-adapted service stream switches.
Table 3 has provided in the present embodiment, the structure of second kind of judgment matrix.But the structure of second kind of judgment matrix is not limited to table 3, and this is that those skilled in the art are understandable.Such as when interface outnumbers 3, second kind of judgment matrix also can have more ranks
Table 3
Wherein, C represents the value of considering, P
iRepresent i interface.Second kind of judgment matrix will be set up respectively according to the value of considering respectively.What deserves to be explained is, because RSSI represents the received signal intensity of wave point, so in the structure of second kind of judgment matrix, for wireline interface is given virtual RSSI attribute, because wireline interface is to carry out transfer of data by the guiding transmission medium, do not relate to signal strength problem, thus in the present embodiment with the virtual RSSI assignment maximum of wireline interface.Be wireline interface and wave point in the middle of the comparison of RSSI, think that wireline interface is absolute more important than wave point.
Further, in a kind of preferred version, when C represents interface load, available bandwidth and RSSI, value is (wherein as follows for element in second kind of judgment matrix, the unit of account of interface load is KB, and the unit of available bandwidth is KB/S, and the unit of RSSI is dBm):
p
i=p
jThe time, a
Ij=1, a
Ji=1
0＜p
i-p
j＜5 o'clock, a
Ij=2, a
Ji=1/2
5＜p
i-p
j＜10 o'clock, a
Ij=3, a
Ji=1/3
10＜p
i-p
j＜30 o'clock, a
Ij=5, a
Ji=1/5
30＜p
i-p
j＜50 o'clock, a
Ij=7, a
Ji=1/7
50＜p
i-p
jThe time, a
Ij=9, a
Ji=1/9
When C represents interface type, element value as follows in second kind of judgment matrix:
If P
iBe wireline interface, P
jBe wave point, then a
Ij=7, a
Ji=1/7.This represents wireline interface P
iThan wave point P
jImportant is many.
When C represents packet loss, element value as follows in second kind of judgment matrix:
Work as P
i=P
iThe time, a
Ij=1, a
Ji=1
As 0＜P
i-P
j＜2% o'clock, a
Ij=2, a
Ji=1/2
As 2%＜P
i-P
j＜5% o'clock, a
Ij=3, a
Ji=1/3
As 5%＜P
i-P
j＜30% o'clock, a
Ij=5, a
Ji=1/5
Work as P
i-P
j＞30% o'clock, a
Ij=7, a
Ji=1/7
The obtaining value method of above-mentioned second kind of judgment matrix element only is a kind of example, understands easily, and the present invention is not limited to above-mentioned value mode.
Step S300 calculates relative weighting.
According to first kind of judgment matrix, calculate the relative weighting w of i the value of considering about general objective
i,, calculate the relative weighting w of l interface about the current value of considering according to second kind of judgment matrix
l, wherein, w
iAnd w
lCalculating can adopt the root method, that is:
Step S400 carries out normalized to step weight that S300 asks, that is:
Wherein, k represents the number of the value of considering
Step S500 calculates the comprehensive satisfaction of each interface.
Comprehensive satisfaction can be according to formula
Calculate V
nThe comprehensive satisfaction of representing n interface, wherein w
jRepresent the relative weighting of j the value of considering, w about general objective
NjRepresent the relative weighting of n interface, w about j the value of considering
jAnd w
NjCalculating and the normalizing method with step S300, step S400.
Step S600 forms pre-switch formation with Business Stream according to priority according to the service flow management table, and wherein the Business Stream that service priority is the highest is a head of the queue.According to the interface synthesis satisfaction each interface arrangement is formed interface queue, wherein, the interface that comprehensive satisfaction is the highest is a head of the queue.
Step S700 if the pre-switch formation is empty, then leaps to step S1100, otherwise, enter step S800.
Step S800, described Business Stream handover management server takes out the head of the queue business from the pre-switch formation, take out the head of the queue interface from interface queue, and this Business Stream and interface are set up mapping.
Step S900 if interface queue is empty, then enters step S1000, otherwise, jump to step S700;
Step S1000 joins the team interface again according to current comprehensive satisfaction height, enters step S700;
Step S1100, described Business Stream handover management server carry out to switch according to matching relationship, handoff procedure in two steps:
In the 1. step, described Business Stream handover management server is carried out at local terminal and is switched, and downstream service flow is switched on the matched interfaces; Above-mentioned downstream service flow is meant the Business Stream that sends to many interface terminations from Business Stream handover management server.
In the 2. step, described Business Stream handover management server sends the Business Stream switching command to terminal, and the switch unit of terminal receives instruction and also automatically performs switching command, finishes the switching of uplink service stream; Above-mentioned uplink service stream is meant the Business Stream that sends to Business Stream handover management server from many interface terminations.
Wherein, the handover command messages form can be adjusted according to different switching execution modes.Such as, switch to implement to be based on that the iptables strategy NETFILTER framework under realizes, then handover command messages can be used for depositing iptables and orders, and present embodiment does not limit the concrete definition of switching command form.
Step S1200, algorithm finishes.
In the present embodiment, self-adapted service stream switches (being step 200～500) and carries out periodically automatically.Present embodiment can be applied to following several situation:
(1) current total interface state is constant, rebulids the matching relationship of Business Stream and interface;
(2) current certain interface become unavailable, with the distributions on it on other usable interfaces;
(3) current certain interface become available, with the part distributions on other interfaces to this interface.
Embodiment 2
According to embodiments of the invention 2, another kind of self-adapted service stream switching method is provided, this self-adapted service stream handover scheme is operated under the non-moving scene.
As shown in Figure 2, under the non-moving scene of present embodiment, three nodes being arranged in the territory, local, is respectively node 1, node 2, node 3, represents many interface terminations of three types respectively: it all is wireless many interface terminations that node 1 is represented total interface; Node 2 is represented existing wave point, and many interface terminations of wireline interface are arranged again; It all is wired many interface terminations that node 3 is represented total interface.
After terminal is connected into the territory, local, initiate registration to Business Stream handover management server, the registration message form is as shown in table 4:
Table 4
| Bind address | The temporary address | Interface type | Interface status | Life span | Priority option |
Wherein, bind address is that the user generates with the Termination ID combination according to the address prefix that Business Stream handover management server provides; The temporary address is the address that each interface of terminal disposes automatically according to prefix; Interface type illustrates that this interface is wired or wireless; Interface status illustrates that this interface is current available or unavailable; Life span is represented the valid expiration date of this log-on message; Priority option is represented the priority of the appointment stream that the user is can be in communication process explicit.
After Business Stream handover management server receives user profile, it is kept in the subscriber information management table, and carries out accreditation verification to terminal transmission response message.The response message form is as shown in table 5 below.
Table 5
| Bind address | The temporary address | Interface type | Interface status | Life span | State |
Wherein, the same registration message of the first five field meaning repeats no more herein.Mode field is represented user's registration message or the success or not of state updating message, 0 expression failure, and 1 represents successfully.
In the above-mentioned subscriber information management table, an interface of each list item counterpart terminal, structure is as shown in table 6.
Table 6
| Bind address | The temporary address | Interface type | Interface status | Interface ID |
Wherein, preceding four same registration messages of field meaning repeat no more herein.Interface ID is used for an interface of marking terminal, can be a random number, but will guarantee its uniqueness.Certainly, the present invention does not limit the concrete definition mode of interface ID, and interface ID also can define by other modes.For example, with MAC (the Media Access Control) address of this interface, need to add the MAC Address field in user's the registration message at this moment, shown in the new registration message form shfft 7.
Table 7
| Bind address | The temporary address | Interface type | Interface status | Life span | Priority option | MAC Address |
After above-mentioned registration process was finished, terminal just can communicate by standard I P Routing Protocol and other nodes.Wherein, carry out interacting message to terminal periodic, be specifically related to following several message with Business Stream handover management server:
(1) state updating message: terminal periodic current each interface message is sent to the Business Stream switching server.The same registration message of its form repeats no more herein.
(2) solicited status updating message: when user profile is about to expire life cycle, Business Stream handover management server can send the solicited status updating message to the user, and the same response message of message format only needs mode field is put 0;
(3) handover command messages: Business Stream handover management server can send to terminal by handover command messages with handoff decision result and carry out, message format will be provided with according to different switching execution modes, such as, switching enforcement is to carry out by the NETFILTER framework, and then message content can comprise concrete iptables order.Understand easily, among the present invention, handover command messages is not limited to specific implementation.
When terminal periodic ground carries out interacting message with Business Stream handover management server, Business Stream handover management server can be periodically based on the AHP algorithm, go out the comprehensive satisfaction of each interface according to user profile, link communication Mass Calculation, draw the matching relationship of Business Stream in conjunction with Business Stream priority again with interface.Comprehensive satisfaction computational process is in full accord with step 200～step 500 among the embodiment 1, repeats no more herein.
Embodiment 3
According to embodiments of the invention 3, another kind of self-adapted service stream switching method is provided, this self-adapted service stream handover scheme is operated under the mobile scene.
As shown in Figure 3, the service flow switching method of present embodiment can be operated in the multiple mobile scene, such as mobile IP v 6 (RFC 3775), mobile IPv 4 (RFC 3344), proxy mobile IPv 6 (RFC 5213) and related expanding mobility management protocol etc.Dispose accordingly according to different mobile scenes, such as for mobile IP v 6, the corresponding units of Business Stream handover management server can be deployed among the HA (home agent), and the corresponding units of many interface terminations is deployed among the MN (mobile node).
Among Fig. 3, shown node 1, node 2, node 3 are represented many interface terminations of three types respectively: it all is wireless many interface terminations that node 1 is represented total interface; Node 2 is represented existing wave point, and many interface terminations of wireline interface are arranged again; It all is wired many interface terminations that node 3 is represented total interface.
In mobile scene, when many interface terminations enter certain when moving in the scene (such as mobile IP v 6, mobile IPv 4, proxy mobile IPv 6), under carrying out this scene, the interacting message of standard, also need to carry out following work:
(1) many interface terminations need be carried out the interface registration and periodically carry out the state renewal to local Business Stream handover management server, and the message meaning is with described in the non-moving scene;
(2) when terminal moves on to foreign lands from being connected into the territory, the foreign lands Business Stream handover management server of access needs periodic statistics link communication conditions, and sends to the Business Stream handover management server in territory, local, and the link-state message form is as shown in table 8.
Table 8
| Bind address | The temporary address | Interface load | Available bandwidth | RSSI (indication of received signal intensity) |
(3) territory, local Business Stream handover management server is periodically based on the AHP algorithm, goes out the comprehensive satisfaction of each interface according to user profile, link communication Mass Calculation, draws the rational Match relation of Business Stream and interface again in conjunction with Business Stream priority.Comprehensive satisfaction computational process is described with step 200～step 500 among the embodiment 1, repeats no more herein;
(4) territory, local Business Stream handover management server sends to many interface terminations by handover command messages with handoff decision result.
It is pointed out that above-mentioned registration message, state updating message, link-quality status message, handover command messages can realize its function by the standard message of expanding under the corresponding mobile scene, also can use the undefined message format of non-moving scene.Such as, registration message and state updating message can realize by expansion BU (Binding Update, Binding Update) messages option field in the mobile IP v 6; Handover command messages can realize by expansion BRR (Binding Refresh Request, Binding Update request) messages option field.Understand easily, above-mentioned various message are not limited to above-mentioned specific implementation.
Embodiment 4
Present embodiment provides a kind of stream switched system, and this stream switched system structure as shown in Figure 4.
Described stream switched system comprises: many interface terminations 100, Business Stream handover management server 200.Wherein, many interface terminations 100 comprise three types: be wireline interface 110 entirely, part wireline interface, part wave point 120 are wave point 130 entirely.
Business Stream handover management server 200 comprises registration statistic unit 201, Business Stream recognition unit 202, switch decision unit 203, switches performance element 204.Wherein, registration statistic unit 201 is used to receive user's registration message, and message is put into the subscriber information management table by user's differentiation, also is used for periodically obtaining the active user's information and the current link circuit condition of these many interface terminations; Business Stream recognition unit 202 is used for Business Stream is distinguished by type, can adopt relatively conventional stream recognition method (such as Layer 7 identifications), type can be set to audio frequency, video, text, other, and corresponding dissimilar respective priority that are provided with; Switch decision unit 203 is used for making switchover policy according to user profile, current link circuit condition, Business Stream priority and in conjunction with the service flow management table, wherein adopt analytic hierarchy process (AHP) (the Analytic Hierarchy Process in the Multi-Objective Decision Theory, AHP) calculate the comprehensive satisfaction of heterogeneous networks interface, the AHP algorithm flow repeats no more with described in the embodiment 1 herein; Switch performance element 204 and be used for, carry out and switch according to handoff decision result.Switch in two steps: the first step, Business Stream handover management server end 200 is carried out the switching of downstream service flow; Second step sent switching command to many interface terminations 100, carried out the switching of uplink service stream by it.
Compared with prior art, the present invention has following technique effect:
1, switch decision of the present invention partly carries out in network side server end self adaptation, and user side only needs to carry out some basic Signalling exchange work (and the user terminal under the mobile context originally also all needs Signalling exchange), also with regard to so that beyond user's side communicates by letter normally, few additional work of trying one's best.
2, the AHP method to multifactor, many standards, multivariant overall merit and trend prediction and effective, is widely used in the various fields such as economy, management, the energy because it is simple and easy and accurate, not yet is employed but switch the field at Business Stream. The present invention considers its accuracy and simplification, the AHP algorithm is used for to the switch decision process, can reduce in a large number time consumption and the power consumption of server end when carrying out switch decision, simultaneously, 5 values of considering among the present invention all are convenient to obtain (can realize by existing user's space/kernel spacing communication mechanism), and can react accurately the communication performance of current each network interface. This all is very important for the work quality and the user satisfaction that improve server end.
3, the present invention is when guaranteeing each Business Stream QOS, can carry out switch decision to the priority level initializing situation of each Business Stream according to the user, thereby realize that suitably carrying out otch according to the current quality of service requirement degree to each Business Stream of user distributes, and fully takes into account user's demand.
4, the present invention had both supported mobile context, also support non-moving scene, can be combined neatly and carry out corresponding deployment with existing standard mobile IPv 4 (RFC 3344), mobile IP v 6 (RFC 3375), proxy mobile IPv 6 (RFC 5213) agreement and related expanding mobility management protocol and non-moving management agreement. Although described the present invention by embodiment, those of ordinary skills know, the present invention has many distortion and variation and do not break away from spirit of the present invention, and the claim of application documents of the present invention comprises these distortion and variation.
Claims (12)
1. self-adapted service stream switching method that is used for communications network system, described communications network system comprises Business Stream handover management server and many interface terminations, described self-adapted service stream switching method comprises:
For each many interface termination, carry out the following step:
1) described Business Stream handover management server periodically obtains the active user's information and the current link circuit condition of these many interface terminations;
2) described Business Stream handover management server is set up judgment matrix respectively based on analytic hierarchy process (AHP), and calculates the comprehensive satisfaction of each interface of these many interface terminations; Wherein, with the general objective of interface synthesis satisfaction, with active user's information and current link circuit condition partial objectives for, with each usable interfaces of described many interface terminations possibility as solution layer as rule layer as destination layer;
3) according to service priority order from high to low each Business Stream is arranged formation pre-switch formation, each interface arrangement is formed interface queue according to interface synthesis satisfaction order from high to low;
4), each Business Stream and each interface are set up mapping formation matching relationship according to pre-switch formation and interface queue;
5) Business Stream handover management server is carried out the Business Stream switching according to described matching relationship on many interface terminations.
2. self-adapted service stream switching method according to claim 1 is characterized in that described user profile comprises interface type, and described link circuit condition comprises interface load, available bandwidth and the indication of received signal intensity.
3. self-adapted service stream switching method according to claim 2, it is characterized in that, in the described step 1), the interface type of each many interface terminations, interface load, available bandwidth and the indication of received signal intensity are obtained from network terminal by Business Stream handover management server.
4. self-adapted service stream switching method according to claim 3 is characterized in that described link circuit condition also comprises packet loss.
5. self-adapted service stream switching method according to claim 1 is characterized in that, described step 1) also comprises following substep:
11) after many interface terminations are connected into the territory, local, initiate registration to Business Stream handover management server, carry user profile in the registration message, described user profile comprises priority option, and this priority option is represented the priority of the specified services stream that the user is can be in communication process explicit;
12) Business Stream handover management server is incited somebody to action wherein user profile preservation after receiving registration message;
13) many interface terminations are periodically to Business Stream handover management server transmit status updating message; Carry current user profile in the state updating message;
14) Business Stream handover management server upgrades active user's information according to the state updating message.
6. self-adapted service stream switching method according to claim 5, it is characterized in that, described communications network system is operated in mobile scene following time, described step 11)～14) in, the Business Stream handover management server that described Business Stream handover management server is the territory, local;
Described step 1) comprises that also the foreign lands Business Stream handover management server of access was periodically added up current link circuit condition, and sends to the Business Stream handover management server in territory, local when step 15) was worked as terminal and moved on to foreign lands from being connected into the territory;
Described step 2)～5), the Business Stream handover management server that described Business Stream handover management server is the territory, local.
7. self-adapted service stream switching method according to claim 2 is characterized in that, the total interface of described many interface terminations all is a wave point; Perhaps existing wave point has wireline interface again; Perhaps total interface all is wired.
8. self-adapted service stream switching method according to claim 7, it is characterized in that, when having wireline interface in described many interface terminations, wireline interface is given virtual received signal intensity indication, and this virtual received signal intensity indication is according to the maximum virtual received signal intensity indication assignment of wave point.
9. self-adapted service stream switching method according to claim 4, it is characterized in that, described step 2) in: when subhead is designated as interface load, available bandwidth or the indication of received signal intensity, element value as follows in second kind of judgment matrix in the analytic hierarchy process (AHP):
p
i=p
jThe time, a
Ij=1, a
Ji=1
0＜p
i-p
j＜5 o'clock, a
Ij=2, a
Ji=1/2
5＜p
i-p
j＜10 o'clock, a
Ij=3, a
Ji=1/3
10＜p
i-p
j＜30 o'clock, a
Ij=5, a
Ji=1/5
30＜p
i-p
j＜50 o'clock, a
Ij=7, a
Ji=1/7
50＜p
i-p
jThe time, a
Ij=9, a
Ji=1/9
Wherein, the unit of interface load is KB, and the unit of available bandwidth is KB/S, and the unit of RSSI is dBm; p
iAnd p
jIt is respectively the value that described second kind of judgment matrix i interface load, available bandwidth or received signal the intensity capable and interface that the j row are represented are indicated; a
IjBe the value of described second kind of capable j column element of judgment matrix i, a
JiIt is the value of described second kind of capable i column element of judgment matrix j;
When subhead is designated as interface type, element value as follows in second kind of judgment matrix:
As P
iBe wireline interface, P
jBe wave point, then a
Ij=7, a
Ji=1/7;
a
IjBe the value of described second kind of capable j column element of judgment matrix i, a
JiIt is the value of described second kind of capable i column element of judgment matrix j;
When subhead is designated as packet loss, element value as follows in described second kind of judgment matrix:
Work as P
i=P
jThe time, a
Ij=1, a
Ji=1
As 0＜P
i-P
j＜2% o'clock, a
Ij=2, a
Ji=1/2
As 2%＜P
i-P
j＜5% o'clock, a
Ij=3, a
Ji=1/3
As 5%＜P
i-P
j＜30% o'clock, a
Ij=5, a
Ji=1/5
Work as P
i-P
j＞30% o'clock, a
Ij=7, a
Ji=1/7
Wherein, p
iAnd p
jIt is respectively the value of packet loss of the interface of the capable and j of described second kind of judgment matrix i row representative; a
IjBe the value of described second kind of capable j column element of judgment matrix i, a
JiIt is the value of described second kind of capable i column element of judgment matrix j.
10. self-adapted service stream switching method according to claim 1 is characterized in that, described step 4) comprises following substep:
41) if the pre-switch formation is empty, then leap to step 5), otherwise, enter step 42);
42) described Business Stream handover management server takes out the head of the queue business from the pre-switch formation, takes out the head of the queue interface from interface queue, and the Business Stream and the interface that are taken out are set up mapping;
43) if interface queue is empty, then enter step 44), otherwise, jump to step 41);
44) each interface is joined the team again according to current comprehensive satisfaction height order.
11. self-adapted service stream switching method according to claim 1 is characterized in that, described step 5) comprises following substep:
51) described Business Stream handover management server is carried out at local terminal and is switched, and downstream service flow is switched on the matched interfaces;
52) described Business Stream handover management server sends the Business Stream switching command to terminal, and the switch unit of terminal receives instruction and carries out switching command, finishes the switching of uplink service stream.
12. a Business Stream handover management server is characterized in that, comprising:
Statistic unit is used for periodically obtaining the active user's information and the current link circuit condition of each many interface termination;
The Business Stream recognition unit is used to obtain the service priority of each Business Stream of each many interface termination;
The switch decision unit is used for setting up judgment matrix respectively according to analytic hierarchy process (AHP), and calculates the comprehensive satisfaction of each interface of these many interface terminations; Wherein, with the general objective of interface synthesis satisfaction, with active user's information and current link circuit condition partial objectives for, with each usable interfaces of described many interface terminations possibility as solution layer as rule layer as destination layer; Also be used for each Business Stream being arranged formation pre-switch formation, each interface arrangement formed interface queue according to interface synthesis satisfaction order from high to low according to service priority order from high to low; According to pre-switch formation and interface queue, each Business Stream and each interface are set up mapping formation matching relationship;
Switch performance element, be used on each many interface termination, carrying out Business Stream and switch according to described matching relationship.
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