CN101841878A

CN101841878A - Switch method, device and system in communication network

Info

Publication number: CN101841878A
Application number: CN 200910080004
Authority: CN
Inventors: 解应春
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2009-03-16
Filing date: 2009-03-16
Publication date: 2010-09-22
Anticipated expiration: 2029-03-16
Also published as: CN101841878B

Abstract

The invention relates to a switch method, a switch device and a switch system in a communication network. The method comprises the following steps: defining the switch grade of a source network and the switch grade of an object network; deciding whether to conduct switch operation based on the switch grade of the source network and the switch grade of the object network; and when switch operation is determined to conduct based on switch decision result, sending a notice to conduct the switch operation. The embodiment of the invention takes the switch grade of the source network and the switch grade of the object network into consideration respectively, including switch urgency degree of the source network, or whether the object network is allowed to switch, and the like, so as to ensure reasonability of switch process and balance different network applications, thereby improving effectiveness of switch algorithm and keeping balance between user satisfaction and network efficiency.

Description

Realize method, the Apparatus and system of switching in the communication network

Technical field

The present invention relates to network communications technology field, relate in particular to the handoff technique in a kind of communication network.

Background technology

Because a variety of causes, as signal strength signal intensity, the demand of commencing business etc., the user may need to switch to another network (objective network) from a network (source network) and continues to commence business.For this reason, in communication network, need provide corresponding handover mechanism, to finish corresponding handover operation.

At present, the handover decisions that adopts in communication network mainly is based on simple measurement result and realizes corresponding switching controls, such as, determine whether to switch according to signal quality, signal strength signal intensity etc.; Perhaps, can also determine whether that in communication network needs switch according to user's selection.When determining to switch, then carry out corresponding handover operation and switch in the objective network and commence business.For example,, then can trigger communication system measurement result is carried out switch decision, whether carry out corresponding handover operation with decision because the measurement result of certain measuring-signal surpasses corresponding threshold values.

The inventor finds that there are the following problems at least in the prior art:

For the complicated day by day network switching process in future, above-mentioned simple handover scheme can't obtain balance between demand that satisfies the user and network efficiency.Especially for future with ubiquitous heterogeneous network, simple handover scheme can't adapt to the complicated demand of different structure network, this process that will make corresponding handoff procedure may cause the user to commence business is affected, and causes obtaining more excellent performance of handoffs; For example, when the user switches in the objective network that performance can't meet the demands, will trigger new handoff procedure, thereby have influence on user's proper communication, and cause user's satisfaction to descend.

Summary of the invention

Embodiments of the invention provide method, the Apparatus and system of realizing switching in a kind of communication network, with the performance of raising switching, and form balance between user satisfaction and network efficiency.

Realize the method for switching in a kind of communication network, comprising:

Determine the switching grade of source network and the switching grade of objective network; The switching grade of described source network comprises at least must switching state, optimize switching state and need not switching state; The switching grade of described objective network comprises at least forbids switching state and allows switching state;

According to the switching grade of described source network and the switching grade of described objective network, when the switching grade of described source network is necessary switching state or optimization switching state, if the switching grade of described objective network is when allowing switching state, then determine to carry out handover operation, if objective network is for forbidding switching state, then determine not carry out handover operation, if the switching grade of described source network is when need not switching state, then definite handover operation of not carrying out;

When determining to carry out handover operation, send the notice of carrying out handover operation according to the handover decisions result.

Realize device for switching in a kind of communication network, comprising:

Source network switches the grade determining unit, is used for determining the switching grade of source network, and the switching grade of described source network comprises at least must switching state, optimize switching state and need not switching state;

Objective network switches the grade determining unit, is used for determining the switching grade of objective network, and the switching grade of described objective network comprises at least forbids switching state and allow switching state;

The handover decisions unit, be used for switching the switching grade of the definite source network of grade determining unit and the switching grade that described objective network switches the definite objective network of grade determining unit according to described source network, when the switching grade of described source network is necessary switching state or optimization switching state, if the switching grade of described objective network is when allowing switching state, then determine to carry out handover operation, if objective network is for forbidding switching state, then determine not carry out handover operation, when the switching grade of described source network when need not switching state, then determine not carry out handover operation;

The switching notice unit is used for sending the notice of carrying out handover operation when described handover decisions unit is determined to carry out handover operation according to the handover decisions result.

A kind of integrated decision-making entity comprises in the above-mentioned communication network and realizes device for switching, and this installs according to the switching grade of described source network and the switching grade of described objective network, carries out handover decisions.

Realize the system of switching in a kind of communication network, comprising:

First decision entity that is used for the switching grade of definite source network, and second decision entity that is used for the switching grade of definite objective network, the switching grade of described source network comprises at least must switching state, optimize switching state and need not switching state, and the switching grade of described objective network comprises at least forbids switching state and allow switching state; By communicating by letter between described first decision entity and described second decision entity, in described first decision entity, according to the switching grade of described source network and the switching grade of objective network, when the switching grade of described source network is necessary switching state or optimization switching state, if the switching grade of described objective network is when allowing switching state, then determine to carry out handover operation, if objective network is for forbidding switching state, then determine not carry out handover operation, when the switching grade of described source network when need not switching state, then determine not carry out handover operation.

The technical scheme that is provided by the embodiment of the invention described above as can be seen, its minute, rank ground considered the switching grade of source network and objective network, require the urgent degree of switching as source network, whether objective network allows switching etc., thereby can guarantee the reasonability of handoff procedure, and can efficient balance at the application of each network, and then improve the validity of handoff algorithms, make and can between user satisfaction and network efficiency, form balance.

Description of drawings

In order to be illustrated more clearly in the technical scheme of the embodiment of the invention, the accompanying drawing of required use is done to introduce simply in will describing embodiment below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.

Fig. 1 is the schematic diagram of the types of variables I in the embodiment of the invention;

Fig. 2 is the schematic diagram of the types of variables II in the embodiment of the invention;

Fig. 3 is the schematic diagram of the types of variables III in the embodiment of the invention;

Fig. 4 is the schematic diagram of the types of variables IV in the embodiment of the invention;

Fig. 5 is the constant interval schematic diagram of the signal strength signal intensity variable in the embodiment of the invention;

The implementation procedure schematic diagram of the embodiment one that Fig. 6 provides for the embodiment of the invention;

The schematic diagram one of the centralized decision that Fig. 7 A provides for the embodiment of the invention;

The schematic diagram two of the centralized decision that Fig. 7 B provides for the embodiment of the invention;

The schematic diagram one of the distributed decision making that Fig. 8 A provides for the embodiment of the invention;

The schematic diagram two of the distributed decision making that Fig. 8 B provides for the embodiment of the invention;

The implementation procedure schematic diagram of the embodiment four that Fig. 9 provides for the embodiment of the invention;

The implementation procedure schematic diagram of the embodiment five that Figure 10 provides for the embodiment of the invention;

The structural representation of the device that Figure 11 provides for the embodiment of the invention.

Embodiment

Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.

The embodiment of the invention provides the method that realizes switching in a kind of communication network, and it can comprise: at first, determine the switching grade of source network and the switching grade of objective network; Wherein, the switching grade of source network comprise at least must switching state, optimize switching state and need not switching state; The switching grade of objective network comprises at least forbids switching state and allows switching state; Afterwards, according to the switching grade of source network and the switching grade of objective network, when the switching grade of source network is necessary switching state or optimization switching state, if the switching grade of objective network is when allowing switching state, then determine to need to carry out handover operation, if the switching grade of source network is for need not switching state, then determine not need to carry out handover operation; And when determining that according to the handover decisions result needs are carried out handover operation, send the notice of carrying out handover operation, carry out corresponding handover operation to notify other entities or part.

In the embodiment of the invention, determine that accordingly the process of the switching grade of source network specifically can comprise following treatment step:

(1) determines each self-corresponding switching grade of one or more switching condition variablees in the source network, and the switching grade of each switching condition variable correspondence can comprise must switching state, optimize switching state and need not all or part of in the switching state, but all of all switching condition variable correspondences switch comprise in grades must switching state, optimize switching state and need not switching state;

Wherein, the switching condition variable in the corresponding source network can comprise in the following parameter one or multinomial: be used to characterize at least one parameter of source network performance, at least one parameter that is used to characterize at least one parameter of user terminal performance or is used to characterize operation information;

(2) determine the switching grade of source network according to each self-corresponding switching grade of one or more switching condition variablees and first fusion rule, write down the mode that is transformed into the switching grade of corresponding source network by each self-corresponding switching grade of one or more switching condition variablees in this first fusion rule;

In the embodiment of the invention, determine that accordingly the process of the switching grade of objective network specifically can comprise following treatment step:

(1) determines each self-corresponding switching grade of one or more switching condition variablees in the objective network, and the switching grade of each switching condition variable correspondence comprises forbids switching state and allows all or part of in the switching state, but all of all switching condition variable correspondences are switched to comprise in grades and forbidden switching state and allow switching state; Wherein, the switching condition variable in the corresponding objective network can comprise at least one parameter that is used to characterize the objective network performance;

(2) determine the switching grade of objective network according to each self-corresponding switching grade of one or more switching condition variablees and second fusion rule, write down the mode that is transformed into the switching grade of corresponding objective network by each self-corresponding switching grade of one or more switching condition variablees in this second fusion rule.

In above-mentioned processing procedure, the corresponding different respectively types of variables of corresponding switching condition variable (comprise in the switching condition variable in switching condition variable and the source network in the objective network at least a), and the switching grade that different typess of variables is corresponding different, promptly different switching condition variablees can be divided into different switching grades.

In the embodiment of the invention, optimization switching state in the switching grade of source network specifically can comprise the rank that several are different, the switching grade of objective network can also comprise not switching state of suggestion, and this advises that switching state can not comprise several different stages yet; Based on this, then the corresponding handover decisions process that provides of the embodiment of the invention can also comprise:

If the switching grade of source network is for optimizing switching state, the switching grade of objective network is for advising not switching state, then according to the rank of the optimization switching state in the switching grade of the rank of switching state and source network not of the suggestion in the switching grade of objective network, determine whether to need to carry out handover operation according to predetermined policy, this predetermined policy comprises: the suggestion in the switching grade of objective network is the corresponding relation between the rank of the optimization switching state in the switching grade of the rank of switching state and source network not, and whether this corresponding relation needs to carry out handover operation.Perhaps, when the switching grade of described source network is must switching state, the switching grade of objective network is determined the execution handover operation when advising not switching state

In the embodiment of the invention, specifically can adopt centralized mode or distributed mode to carry out the handover decisions operation, if adopt centralized mode, then specifically can carry out handover decisions by the integrated decision-making entity (or claiming comprehensive fuzzy decision device) of appointment according to the switching grade of corresponding source network and the switching grade of objective network; If adopt distributed mode, then can determine the switching grade of source network by first decision entity (or claiming source fuzzy decision device), second decision entity (or claiming the objective fuzzy decision-making device) is determined the switching grade of objective network, and, can on first decision entity, carry out corresponding handover decisions operation by communicating by letter between first decision entity and described second decision entity.

In the embodiment of the invention, can also in a plurality of objective networks, select a final goal network, and switch in this final goal network according to the switching grade of source network and the switching grade of a plurality of described objective networks as this source network correspondence.

Alternatively, in the embodiment of the invention, can be set to when the predetermined trigger condition of basis determines that needs trigger handover decisions, just the step of the switching grade of the switching grade of the definite source network of execution and objective network is operated to carry out follow-up handover decisions.Particularly, corresponding predetermined trigger condition can comprise other predetermined trigger condition of some levels, and corresponding different user terminal and the network performance conditions (as source network performance and/or objective network performance etc.) of other predetermined trigger condition of each grade; Alternatively, in the process that continues to meet other predetermined trigger condition corresponding user terminal of same level and network performance condition, can only trigger the step of the switching grade of the switching grade of once carrying out described definite source network and objective network.

By the invention described above embodiment, can effectively solve the switching condition collision problem, as solving the switching collision problem between user and the operator, the factor of promptly comprehensive two aspects is carried out handover operation, to realize active balance between the two.And, can also under the situation of the characteristic that takes into full account system, effectively improve the overall performance that switches, as network stabilization, the utilization of resources, user's satisfaction, QOS (service quality) etc.

In a word, in the switching judging process, the either-or judgement that the embodiment of the invention is no longer only switched or do not switched, but in a scope, the factors such as influence degree of network performance are carried out classification to judging the result of switching according to urgency of switching and switching.Thereby reach the purpose that overall performance of network is optimized when switching.

Below will be respectively determine the switching grade of source network and determine that the process of the switching grade of objective network carries out following explanation corresponding.

Concrete, the switching grade of source network can comprise: can (MAY) switching state, should (SHOULD) switching state, must (MUST) switching state and normal (NORMAL) state of source, the switching grade of totally four kinds of source networks, wherein:

The MUST switching state is meant and must switches, and for pressure is switched, otherwise may cause situations such as teleservice will break to occur;

The SHOULD switching state is meant and switches, and is a kind of prediction switch instances, and strong suggestion is switched;

The MAY switching state is meant and can switches, and is a kind of situation of optimizing switching, is the suggestion more weak than SHOULD switching state, generally is used to indicate the optimization to network;

Source NORMAL state is meant and is in normal condition at present, do not need to carry out handover operation.

Switch in the grade at above-mentioned four kinds, SHOULD switching state and MAY switching state also can be merged into a grade, be specially and optimize switch (or claiming suggestion to switch) state, promptly above-mentioned four kinds switch grades also can for: must switching state, optimize switching state and need not switching state (being the source normal condition).Above-mentioned each state also can carry out careful further division, for example, the MUST switching state further can be divided the MUST switching state of several grades, perhaps, also source NORMAL state further can be divided into some other source normal conditions of level, or the like.

Particularly, the switching grade of objective network can comprise: not (MAY NOT) switching state, not (SHOULD NOT) switching state, normal (NORMAL) state of (MUST NOT) switching state and target side not, the switching grade of totally four kinds of objective networks, wherein:

MUST NOT switching state is meant and can not switches, and promptly forbids switching state, and its reason may can't satisfy the requirement of switching because of network condition;

SHOULD NOT switching state is meant and does not switch, and in this case, if switch, may have influence on the objective network performance;

MAY NOT switching state is meant and can switch that the intensity that its suggestion is not switched will be weaker than SHOULD NOT switching state;

Target side NORMAL state then is meant normal condition, allows to carry out handover operation, or is called the permission switching state.

Switch in the grade at above-mentioned four kinds, SHOULD NOT switching state and MAY NOT switching state also can be merged into a grade, are called not switching state of suggestion.Above-mentioned each state also can carry out careful further division, for example, MUST NOT switching state further can be divided the MUST NOT switching state of several grades, perhaps, also target side NORMAL state further can be divided into some other target side normal conditions of level, or the like.

In the embodiment of the invention, specifically can carry out the division of the switching grade of the switching grade of above-mentioned source network and objective network, and then realize handover decisions according to the switching condition parameter.Corresponding switching condition parameter can come from any network layer, for example, and can be from the signal of various user terminals, various heterogeneous network, bottom or the strategy on upper strata, or the like.Make corresponding handover decisions can take all factors into consideration the operation conditions of whole network with switching condition parameter, and carry out switch decision in view of the above, thereby effectively improve the performance of switching by wide material sources.

At different networks, specifically can adopt different switching condition parameters, for example, from network layer, corresponding switching condition parameter can comprise the decision variable on upper strata and the state variation amount of lower floor.As shown in table 1, further, the decision variable on corresponding upper strata can comprise: the available bandwidth of network side, network delay, congested, telephone traffic, in the battery electric quantity of user side, expense, COS and the specific selection business one or multinomial; The state variable of corresponding lower floor can comprise: in position, source network signal strength signal intensity, objective network signal strength signal intensity, source network signal quality, objective network signal quality and the translational speed one or multinomial, or the like.

Table 1

In table 1, the types of variables that different switching condition parameters is corresponding different, and then the switching grade of switching condition variable that can be corresponding different will describe the variables corresponding type below.

That is to say, at different switching condition parameters (being the switching condition variable), need be its definite types of variables that is belonged to, particularly, corresponding switching condition parameter can be divided into four kinds of different typess of variables, be respectively: types of variables I, types of variables II, types of variables III and types of variables IV.Certainly, also can be divided into more types of variables, perhaps, be divided into types of variables still less.

Below will be respectively the concrete implication of above-mentioned four kinds of different typess of variables be described:

(1) types of variables I

As shown in Figure 1, types of variables I comprises NORMAL state and two ranks of MAY (NOT) switching state.For example, if with the poor signal quality of objective network and source network as triggering variable, then can think if corresponding poor promptly there is not better available signal for negative value belongs to the NORMAL state; If corresponding poor be on the occasion of, then think can cause triggering in the sub-district of having found better signal, but this triggers and is nonessential handover trigger, promptly trigger rank lower (priority is lower), be the MAY switching state; That is to say, on the basis of this triggering, also will comprehensively judge other networks (source network and/or objective network) condition in addition.MAY switching state rank is usually as optimizing the suggestion that network or user terminal performance improvement improve.

Promptly only be used to optimize the switching condition variable of purpose, belong to types of variables I.For example for the signal strength signal intensity of detected objective network, if it then thinks to be optimized switching, so be set at MAY switching state rank better than current network (being source network), be types of variables I, even show that objective network has better signal quality and also do not execute switching.

(2) types of variables II

As shown in Figure 2, types of variables II comprises NORMAL state, SHOULD (NOT) switching state and three ranks of MAY (NOT) switching state.For example, under the less triggering type of user terminal electric weight, the triggering of the highest level of employing can be set to the SHOULD switching state, and this SHOULD switching state is a handoff advice still, and does not require the state that must switch.

Promptly the switching condition variable of this types of variables II correspondence specifically can be used for proposing to optimize, indicating or suggestion switching, but if does not switch the interruption that also can not have influence on customer service.For example, just can be used as the foundation that improves user experience for switching condition variablees such as battery electric quantity or expenses, but the foundation of itself and nonessential switching, so can its highest level be set to the grade of SHOULD switching state, promptly it is the switching condition variable of types of variables II.

(3) types of variables III

As shown in Figure 3, types of variables III comprises NORMAL state, MUST (NOT) switching state, SHOULD (NOT) switching state and four ranks of MAY (NOT) switching state.For example, the triggering type of poor signal quality, the highest level of employing can be set to the MUST switching state; This is because will not cause service disconnection as if not switching under the situation of the non-constant of signal, so be provided with the MUST switching state, must carry out handover operation under this rank; And SHOULD switching state and MAY switching state only play the purpose of advance notice in advance, show that unfavorable factor may appear in the communication system operation, at this moment, can assess, so that determine whether to carry out handover operation by comprehensive judgement to the communication system operation conditions.

The switching condition variable that is types of variables III correspondence specifically can be used for proposing to optimize, indicating or suggestion switching, and if reach extreme case, may have influence on the interruption of Network or have a strong impact on network performance.For example, just can it be set to variable under the types of variables III for the switching condition variablees such as translational speed of available bandwidth, network delay, congested, telephone traffic, position, source network signal strength signal intensity, source network signal quality or user terminal.

(4) types of variables IV

As shown in Figure 4, types of variables IV comprises NORMAL state and two ranks of MUST switching state (or MUST NOT switching state), and promptly under this types of variables IV, a kind of situation is to switch, and another kind of situation is to switch.For example, select service provider, select COS or select situations such as administrative ownership place for the user, if in range of choice, it then is the NORMAL state, if not in range of choice, it then is the MUST switching state, i.e. expression must be carried out and switch, with the service provider that switches to selection, the COS of selection or the administrative ownership place of selection etc., perhaps, be MUST NOT switching state, i.e. expression does not allow to switch to the service provider of selection, the COS of selection or the administrative ownership place of selection etc.The triggering rank of corresponding M UST switching state or MUST NOT switching state is enforceable triggering rank.

Promptly belong to types of variables IV for switching condition variable with clear and definite either-or boundary.For example, particular operator service of selecting for the user or business etc. all have clear and definite either-or boundary, thereby it can be set to the variable under the types of variables IV.

At the switching condition variable that different typess of variables comprises, also need to determine the constant interval value of switching condition variablees at different levels under the relevant variable type.Particularly, be defined as the variable of relevant variable type (being defined as types of variables III) at the switching condition variable that handover measurement will will be used for after, also need to define the interval value of corresponding switching condition variable correspondence under different stage as switching condition variable with signal strength signal intensity.For example, be example with the signal strength signal intensity variable that belongs to types of variables III, because types of variables III has four ranks,, can be (+∞ as shown in Figure 5 so need define four different intervals respectively for this signal strength signal intensity variable, a], [a, b], [b, c], [c ,-∞), and a＞b＞c.The rank of these four different interval corresponding respectively signal strength signal intensities is normal, poor, very poor, non-constant.

By the interval value of determining, just can be according to determining the situation of current network at the measurement result of signal strength signal intensity variable, and then determine whether to trigger the handover decisions process one time.Be example still with the signal strength signal intensity variable, the handover trigger of signal strength signal intensity can be divided into 3 grades: MAY switching state, SHOULD switching state and MUST switching state, corresponding poor, very poor, the non-constant of signal quality is not if signal strength signal intensity normally then triggers; Afterwards, just can carry out periodic measurement, (remove normal interval when measured value falls into certain interval to signal strength signal intensity, promptly interval (+∞, a]) time, the handover decisions that just can cause once at this grade triggers, the urgent degree difference that the handover decisions that different brackets causes triggers.And whether each handover decisions triggers the assessment that will initiate the primary network performance, promptly obtains the switching condition variable of source network and objective network, need switch with accurate decision-making.Need to prove,, only trigger once corresponding handover decisions, in the process that constantly descends in signal strength signal intensity, only need to trigger 3 handover decisions (corresponding above-mentioned 3 grades) and get final product usually at each grade.

At one or more switching condition variablees that above-mentioned different types of variables comprises, also need determine corresponding membership function at every kind of switching condition variable.Wherein, types of variables IV has clear and definite either-or characteristic, so it need not to carry out fuzzy decision, can not determine corresponding membership function for it, then can determine each self-corresponding membership function for types of variables I, types of variables II and types of variables III according to its attribute.Particularly, can adopt the triangular form membership function, perhaps, also can adopt other membership function, as ladder type, Gaussian, S type and S type membership function on the lower side on the upper side, or the like.Just can determine corresponding fuzzy rule according to the different brackets of each switching condition variable according to corresponding membership function.For example, if the signal strength signal intensity in the switching condition variable is a normal level, then do not need to switch; If the signal strength signal intensity in the switching condition variable is the MAY level, promptly difference in signal strength then can be switched; If the signal strength signal intensity in the switching condition variable is the SHOULD level, promptly signal strength signal intensity is relatively poor, then should switch; If the signal strength signal intensity in the switching condition variable is the MUST level, promptly the non-constant of signal strength signal intensity then must switch.The method of the ambiguity solution that adopts can be a weighted mean method, and just gravity model appoach can certainly adopt additive methods such as maximum membership degree.

Below in conjunction with concrete Application Example the handover decisions processing procedure that the embodiment of the invention provides is described in detail.

Embodiment one

The embodiment of the invention specifically can but be not limited to be applied in the handoff procedure of heterogeneous network, in realizing that fuzzy decision in the corresponding handoff procedure is handled.

As shown in Figure 6, based on the division result of the switching grade in above-mentioned source network and the objective network, and the division result of types of variables, the handoff process that comprises the fuzzy decision processing that this embodiment one provides specifically can may further comprise the steps:

Step 1, user terminal and source network are measured various measured values, to obtain corresponding switching condition variable.

Step 2, the switching condition variable that obtains when step 1 satisfies the condition that handover decisions triggers, and then can initiate a handover decisions and trigger.

Whether step 3 meets MUST NOT switching state in the inquiry judging objective network, if meet, then do not carry out handover operation, and this handover decisions process finishes, otherwise, execution in step 4;

Particularly, the switching condition variable that belongs to types of variables IV in objective network is the rank of MUST NOT switching state, then confirm the current MUST of meeting NOT switching state, as forbid being user terminal selecting operator, perhaps, COS that provides for user terminal customization etc. is provided, specifically can judges whether whether the switching condition variable meets MUST NOT switching state by authentication modes such as AAA.In addition, in objective network, if the MUST switching state that the measured value level that belongs to the switching condition variable of types of variables III class has reached, then confirm the current MUST of meeting NOT switching state, for example, measure and determine that objective network is very congested, perhaps, measure and determine that there is not the bandwidth condition that can satisfy the switching requirement in objective network, perhaps, objective network can't satisfy QOS requirement etc.

Whether step 4 meets the MUST switching state in the query source network, if meet, then directly carry out corresponding handover operation, otherwise execution in step 5 is promptly carried out corresponding fuzzy decision;

As seen, as shown in table 2, in the handover decisions process,, then can't carry out handover operation if objective network does not support to switch or can not satisfy the requirement of switching.And objective network is not the situation (being non-MUST NOT switching state) that can not switch if source network must switch, and then can directly carry out switching, and is mutual with the network signal that reduces a large amount of other condition judgment; For example, the non-constant of the signal of source network, and the objective network condition is normal, then can directly carry out handover operation, with effective raising switching efficiency, saves the Internet resources that handoff procedure takies.Be not in the situation that MUST switching state and objective network are not in MUST NOT switching state for source network, then need further to carry out corresponding fuzzy decision, and then determine whether to need to carry out handover operation.

Table 2

Particularly, in source network, if belong to the rank that the switching condition variable of types of variables IV is in the MUST switching state, for example, the user is according to the mandatory order of preference, and operator determines that then source network meets the MUST switching state according to the mandatory order of network management etc.In addition, in source network, if the MUST switching state that the measurement result that belongs to the switching condition variable of types of variables III has reached, for example, source network is very congested, perhaps, the signal strength signal intensity of user terminal very a little less than, perhaps, user terminal is away from source network, or the like, determine that then source network meets the MUST switching state.

Step 5 is obtained the condition (except that the MUST switching state other switch grades) of the non-MUST switching state of source network and the condition of the non-MUST NOT switching state of objective network (other switching grades except that MUST NOT switching state).

Step 6 utilizes the fuzzy decision device to carry out fuzzy decision;

Particularly, can carry out whether needs are carried out the decision-making treatment of switching according to predetermined strategy, for example, according to the corresponding relation between the switching grade of the switching grade of the source network of preserving in advance and objective network, reach the pairing handover operation mode of this corresponding relation (switch or do not switch) and determine whether to need to carry out handover operation, or the like;

Corresponding fuzzy decision device can be one, is called comprehensive fuzzy decision device; Perhaps, also can be two, if two, then be respectively source fuzzy decision device and objective fuzzy decision-making device, and finish corresponding handover decisions operation by Signalling exchange between source fuzzy decision device and the objective fuzzy decision-making device.

Step 7 determines whether and will switch according to the result of fuzzy decision, and when determining to need to carry out handover operation, carries out corresponding handover operation.

Embodiment two

In this embodiment two, specifically can in comprehensive fuzzy decision device, set up the centralized decision table, and carry out handover decisions according to this centralized decision table and handle.

Particularly, be as being arranged in the source network in the large-scale data base set with centralized decision table (or claiming fuzzy reasoning table).Suppose only to consider telephone traffic, battery electric quantity and translational speed with source network in the heterogeneous network of overlapping covering, and do not consider the information of user terminal in the objective network, only consider that telephone traffic is an example, then corresponding centralized decision table is as shown in table 3:

Table 3

In table 3, abscissa is represented the telephone traffic of objective network, be respectively normal, general high, very high, very high, ordinate is represented the telephone traffic of source network, the battery electric quantity of user terminal, the translational speed of user terminal, with reference to shown in the table 1, because battery electric quantity belongs to Type II, so comprise two-stage: general low and very low, telephone traffic and translational speed belong to type-iii, so comprise three grades.

Shown in Fig. 7 A, based on the centralized decision table of setting up, just can carry out handover decisions by the mode of centralized decision handles, comprise: source network is passed in the information unification of all switching condition variablees that measure to obtain of source network and objective network, handle to utilize the centralized decision table to carry out centralized decision-making, promptly carry out corresponding fuzzy operation and make a strategic decision, carry out defuzzification then and handle, under the condition of source network and objective network being carried out aggregative equilibrium, to realize handover decisions.Specifically can adopt weighted mean method in the corresponding defuzzification processing procedure, also can adopt gravity model appoach, perhaps, also can adopt the mode of maximum membership degree, or the like.

Based on the centralized decision table of setting up, shown in Fig. 7 B, corresponding handover decisions processing procedure can may further comprise the steps:

Step 1, user terminal moves to objective network from source network, if the signal quality of current source network begins to descend, then working as corresponding signal quality drops to a certain degree, promptly meet different switching grade (as MAY switching state, SHOULD switching state or MUST switching state etc.), user terminal will cause handover decisions to be triggered, to initiate corresponding handover decisions operation.For example, if current be the MAY switching state, when corresponding signal quality drops to the amount of SHOULD switching state correspondence, then can initiate corresponding handover decisions and operate.

Step 2, user terminal is initiated the message of handover decisions request to source network, promptly send the message of handover decisions request, to report source network as the switching condition variable at the measurement result of the signal quality of current source network, initiate the message of handover decisions request then by source network to comprehensive fuzzy decision device.

Step 3, comprehensive fuzzy decision device is initiated MUST NOT condition request message to objective network, whether there is the situation that meets MUST NOT switching state with the query aim network, after objective network receives this MUST NOT condition request message, inquire about current running status, and return MUST NOT condition response message, carrying MUST NOT condition in this message, as one in the conditions such as network is congested unusually, available bandwidth is not enough or multinomial, further, the concrete numerical value that also can comprise Congestion Level SPCC and/or available bandwidth, or the like; At this moment, accordingly comprehensive fuzzy decision device is judged according to the content of the MUST NOT condition response message of returning, and meets MUST NOT switching state as if objective network, then direct execution in step 8, otherwise, execution in step 4;

Step 4, comprehensive fuzzy decision device sends the request of MUST condition to source network, whether meets the MUST switching state with the query source network; After source network receives this MUST condition request, inquire about current running status and return MUST condition response message, carrying corresponding M UST condition in this message, at this moment, comprehensive fuzzy decision device is judged according to the content in the MUST condition response message of returning, and meets the MUST switching state as if source network, then direct execution in step 8, otherwise, execution in step 5.

Step 5, comprehensive fuzzy decision device sends the request of non-MUST condition to source network, with the non-MUST condition (promptly other except that the MUST switching state switch grade) of query source network; Source network is inquired about current running status and is returned non-MUST condition response message after receiving this non-MUST condition request, is carrying non-MUST condition in this message, as signal strength signal intensity, the isoparametric value of current location;

Step 6, comprehensive fuzzy decision device sends the request of non-MUST NOT condition to objective network, to inquire about non-MUST NOT condition (promptly other except that MUST NOT switching state switch grade), after objective network receives this non-MUST NOT condition request, inquire about current running status and return non-MUSTNOT condition response message, in this message, carrying non-MUST NOT condition, as the value of the network bandwidth, objective network parameter such as congested;

Step 7, comprehensive fuzzy decision device are utilized the centralized decision table to carry out fuzzy decision and are handled the non-MUST condition of source network of acquisition and the non-MUST NOT condition of objective network.

Step 8, comprehensive fuzzy decision device is made switch decision, and sends the handover decisions response message to source network, and source network sends the handover decisions response message to user terminal; After user terminal receives the handover decisions response message, if need to switch, then initiate to switch the operation of carrying out, otherwise switching flow finishes.

Embodiment three

In this embodiment three, specifically can in the fuzzy decision device of source, set up the decision table of source network, and the decision table of in the objective fuzzy decision-making device, setting up objective network, and mutual between source fuzzy decision device and objective fuzzy decision-making device according to the decision table of the decision table of this source network and objective network, handle to carry out corresponding handover decisions.

That is to say, corresponding decision table (or claiming fuzzy reasoning table) can also adopt distributed mode to be present in source network and the objective network, is called the decision table (or fuzzy reasoning table of title source network) of source network and the decision table (the perhaps fuzzy reasoning table of objective network) of objective network.Suppose in the heterogeneous network of overlapping covering, only consider telephone traffic, battery electric quantity and translational speed with source network, and do not consider the information of user terminal in the objective network, and only consider that telephone traffic is an example, then the decision table of the decision table of corresponding source network and objective network is respectively shown in table 4 and table 5:

Table 4

Table 5

Shown in Fig. 8 A, by the decision table of above-mentioned source network and the decision table of objective network, just can be source network and objective network to be carried out handover decisions respectively by distributed decision making by source fuzzy decision device and objective fuzzy decision-making device, realize corresponding defuzzification processing, afterwards, the result compares to handover decisions, to determine whether to carry out handover operation, which further, can also select to switch in the objective network.In distributed decision making, owing to do not need the bulk information of objective network is passed to source network, thereby can save the communication resource that takies in the handover decisions process so that signaling between source network and the objective network and data interaction are less.Wherein, specifically can adopt weighted mean method in the corresponding defuzzification processing procedure, also can adopt gravity model appoach, perhaps, also can adopt the mode of maximum membership degree, or the like.

Based on the decision table of the source network of setting up and the decision table of objective network, shown in Fig. 8 B, corresponding handover decisions processing procedure can may further comprise the steps:

Step 1, user terminal moves to objective network from source network, if the signal quality of source network begins to descend and acquire a certain degree, promptly meet different switching grade (as MAY switching state, SHOULD switching state or MUST switching state etc.), trigger just user terminal can be initiated corresponding handover decisions.

Step 2, user terminal is initiated the message of handover decisions request to source network, measurement result is reported source network as the switching condition variable, and by the message of source network, and then by the message of source fuzzy decision device to the request of objective fuzzy decision-making device initiation handover decisions to the request of source fuzzy decision device initiation handover decisions.

Step 3, source fuzzy decision device sends the request of MUST condition to source network, after source network receives the request of MUST condition, inquire about current running status and return MUST condition response message, according to the content in the MUST condition response message, if source network meets the MUST switching state, then direct execution in step 5, otherwise, execution in step 4.

Step 4, source fuzzy decision device sends the request of non-MUST condition to source network, after source network receives the request of non-MUST condition, inquires about current running status and returns non-MUST condition response message, execution in step 5.

Step 5, source fuzzy decision device obtains Query Result according to the MUST condition response message that receives, and directly make the MUST handover decisions, perhaps, obtain Query Result according to the non-MUST condition response message that receives, and carry out the fuzzy decision of source network according to the decision table of source network, as the fuzzy decision numerical value that obtains according to fuzzy decision to switch, this numerical value is used to represent the significance level switched; Afterwards, according to the operating result execution in step 10 of step 9.

Step 6, the objective fuzzy decision-making device is initiated MUST NOT condition request message to objective network, after objective network receives MUST NOT condition request message, inquire about current running status and return MUST NOT condition response message, according to the information in the MUSTNOT condition response message, if objective network meets MUST NOT switching state, then direct execution in step 8, otherwise, execution in step 7.

Step 7, the objective fuzzy decision-making device is initiated non-MUST NOT condition request message to objective network, after objective network receives non-MUST NOT condition request message, inquires about current running status and returns non-MUST NOT condition response message, execution in step 8;

Step 8, objective fuzzy decision-making device receive the non-MUST NOT condition response message that objective network returns, and directly make the decision-making that MUST NOT switches according to Query Result, perhaps, carry out fuzzy decision according to the decision table of Query Result and objective network; Afterwards, execution in step 9.

Step 9, the objective fuzzy decision-making device sends the handover decisions response message to source fuzzy decision device, with corresponding handover decisions result notification source fuzzy decision device, and according to the operating result execution in step 10 of above-mentioned steps 5.

Need to prove, above-mentioned steps 3 to the operating process of step 5 and above-mentioned steps 6 to the qualification of not carrying out sequential relationship between the operating process of step 9, can walk abreast and carry out, also executed in parallel not.

Step 10, source fuzzy decision device carries out handover decisions according to the handover decisions response message that the handover decisions result and the objective fuzzy decision-making device of source network sends, promptly make switch decision, and to source network transmission handover decisions response message, notifying corresponding handover decisions result, and send the handover decisions response message to user terminal by source network; After user terminal is received the handover decisions response message,, then initiate to switch the operation of carrying out if need determining switches, otherwise, do not carry out corresponding handover operation, promptly finish the hand-off process flow process.

Embodiment four

In this embodiment four, provide and carried out the implementation that optimal network is selected, with in network switching process, guarantee the equilibrium of network application, improve the performance that communication network provides service.

For example, when the existing network load near high capacity, if face the switching of a large amount of call business or a large number of users, then the percent of call lost or handover failure rate will be than higher.For this reason, need user terminal when carrying out network switching selection, consider the network equalization problem, promptly the operation conditions according to each heterogeneous networks is evenly distributed to certain customers in the adjacent network.With the user terminal in the cellular network neighbor cell is example, when this user terminal switches, may face the sub-district of a plurality of heterogeneous networks, at this moment, just need to select only sub-district as Target cell, at least comprise aspect in selecting the process of only sub-district, needing to consider: current network performance, following network performance, the load balancing of network, in professional Congestion Level SPCC and user's the experience one or multinomial, the corresponding following network performance can comprise: if an offered load is near high capacity, though also can switch to this network, but this network can hold other users' resource will tail off, at this moment, if there is the lighter network of other loads, then consider, should switch in the lighter network of corresponding load from the angle of the network performance in future.

If the switching implementation that adopts optimal network to select, in the time of can also in the floored community that covers, carrying out hand-off process, can make the user terminal reasonable distribution in floored community that makes high low speed, thereby make floored community when big capacity, the big covering are provided, hand off signaling in the communication system can also be limited in the reasonable range, thereby reach the purpose of the rational management of user terminal in floored community, the communication performance of the communication system of final optimization pass floored community.

The implementation that the optimal network based on fuzzy decision that this embodiment four provides is selected may further comprise the steps as shown in Figure 9:

Step 1 is identical to the processing procedure of step 9 with step 1 in the foregoing description three to the concrete processing procedure of step 9, is not described in detail at this; Wherein, source fuzzy decision device will be received the handover decisions response message that a plurality of objective fuzzy decision-making devices send, and the processing procedure carried out of each objective fuzzy decision-making device is identical to the processing procedure of step 9 description with step 6 among the embodiment three;

Step 10, source fuzzy decision device is according to handover decisions result's (being the handover decisions response message) of a plurality of objective networks of receiving, the switching grade of a plurality of objective networks sorted determine optimum network, and the handover decisions result sent to source network by the handover decisions response message, source network sends to user terminal with the handover decisions response message, after user terminal receives the handover decisions response message, if determine to need to carry out handover operation, then initiate to switch the operation of carrying out to the optimal target network, if determine not need to carry out handover operation, then handoff process stops.

Embodiment five

In this embodiment four, the implementation that provides group user to switch by grade.Particularly, at cell boarder, the user of switching when moment more for a long time, the group that a plurality of users can be used as a centralized management switches simultaneously, for example, decentralized group can be unified to switch (as to the handoff request unified management in the predetermined time interval) in the occasion of mobile relaying.At this moment, corresponding objective network possibly can't satisfy the switching demand of all users in the group, like this, just need preferentially satisfy high user terminal of some priority and business, the resource of distributing objective network according to user's rank, and other user terminals or professional because the switching rank is lower and the finiteness of target network resource can't switch; For example, the user of signal difference is than the user's who wishes the reduction expense switching priority height, and the switching that triggers for the user terminal of optimizing purpose also may be terminated, or the like.

Particularly, as shown in figure 10, the implementation that corresponding group user is switched by grade specifically can may further comprise the steps:

Step 1, user terminal group moves to objective network from source network, if the signal quality of source network begins to descend and acquire a certain degree, promptly meet different switching grade (MAY switching state, SHOULD switching state or MUST switching state), user terminal will be initiated corresponding handover decisions and be triggered;

Endpoint groups (or claiming group user) is initiated in the process of handover decisions triggering, can trigger in the handover decisions that the dispersion user in the preset time interval stats group is initiated, when meeting predetermined quantitative requirement, just can initiate to trigger at the handover decisions of group; Particularly, can initiate corresponding handover decisions by mobile relaying replacement endpoint groups at the handover decisions triggering of group and trigger, perhaps, also can deliver the user and initiate corresponding handover decisions triggering by mobile relaying;

In a word, logically, trigger at the handover decisions of group and unifiedly to be initiated by group's controller, promptly represent that by group's controller group initiates corresponding handover decisions and triggers, corresponding group controller can be delivered user etc. for mobile relaying or mobile relaying.

Step 2, group's controller is to the message of source network initiation handover decisions request, so that group's measurement result is reported source network as the switching condition variable; And by the message of source network to the request of source fuzzy decision device initiation handover decisions, corresponding source fuzzy decision device is also initiated the message of handover decisions request to the objective fuzzy decision-making device.

Step 3 is similar to the processing procedure of step 9 to processing procedure and the step 3 in the foregoing description three that step 9 adopts, and is not described in detail at this; Need to prove, mutual MUST condition request or the message of replying between source fuzzy decision device and the source network, and request of non-MUST condition or response message, can be at unified a piece of news (request of MUST condition or the message of replying of adopting of group, perhaps, request of non-MUST condition or response message) finish function corresponding, can be indicated as being message in the message at group, perhaps, also can directly adopt many corresponding with each user terminal in the group respectively message (the i.e. message that adopts the request of a MUST condition respectively or reply at each processing procedure of each user terminal, perhaps, request of non-MUST condition or response message) the realization function corresponding;

Step 10, finish the processing procedure of above-mentioned steps 3 to 9 after, source fuzzy decision device can switch the ordering of grade according to the fuzzy decision result to each user terminal in the group, and carries out handover decisions according to the rank of each user terminal; Afterwards, the handover decisions result is sent to source network by the handover decisions response message, source network sends to group's controller with the handover decisions response message; At last, respectively the handover decisions response message is sent to each user terminal in the group as required in order by group's controller, and carry out corresponding handover decisions by each user terminal, perhaps, also can directly replace group to carry out handover decisions by group's controller;

The corresponding process of carrying out handover decisions comprises: for the user terminal in the group of needs switching, then relevant user terminals or group's controller are initiated corresponding handover operation, for the user terminal in the group that does not need to switch, then do not carry out hand-off process.

In this step 10, the handover decisions process that source fuzzy decision device adopts specifically can comprise:

At first, determine the switching rank of each user terminal according to the switching grade of the source network of each the user terminal correspondence in the group and the switching grade of objective network, each user terminal is carried out stage of switches other is determined thereby can take all factors into consideration the operation conditions of source network side, the state of active user's terminal and the operation conditions of current goal network etc.;

Afterwards, switching rank according to each user terminal is carried out handover decisions, corresponding handover decisions specifically can comprise: user terminal resource needed, the order of replying the order of user terminal handoff request, each user terminal switching execution in the group and the information whether user terminal is rejected switching when switching according to the switching level allocation of each user terminal correspondence, if refusal switches, then can also comprise corresponding refusal information, as Reason For Denial etc.

Implementation at group user is switched by grade not only can preferentially satisfy high user terminal of priority and business, the resource of distributing objective network according to user's rank.Simultaneously, at certain customers' terminal or business, consider that switching rank finiteness lower and target network resource possibly can't switch.Like this, just, can effectively improve the overall network performance when switching.

Application by the invention described above embodiment, changed the handover trigger mode of traditional single triggering, but traditional measurement value (as signal strength signal intensity, link-quality or battery electric quantity etc.) is divided into several grades, everyly reach a grade, just can carry out the primary network Performance Evaluation, and then carry out corresponding handover decisions and handle.

And the embodiment of the invention can also rationally be divided into a plurality of switching grades with switching, and then is convenient to carry out corresponding fuzzy decision operation, has reduced the complexity of heterogeneous network handoff procedure.And can in time carry out hand-off process at the condition that must switch, and needn't carry out fuzzy decision, thus reduce unnecessary hand off signaling reciprocal process, improve switching efficiency.

One of ordinary skill in the art will appreciate that all or part of flow process that realizes in the foregoing description method, be to instruct relevant hardware to finish by computer program, described program can be stored in the computer read/write memory medium, this program can comprise the flow process as the embodiment of above-mentioned each side method when carrying out.Wherein, described storage medium can be magnetic disc, CD, read-only storage memory body (Read-Only Memory, ROM) or at random store memory body (RandomAccess Memory, RAM) etc.

The embodiment of the invention also provides in a kind of communication network and has realized device for switching, and its specific implementation structure comprises as shown in figure 11:

Source network switches grade determining unit 111, is used for determining the switching grade of source network, and the switching grade of described source network comprises at least must switching state, optimize switching state and need not switching state;

Objective network switches grade determining unit 112, is used for determining the switching grade of objective network, and the switching grade of described objective network comprises at least forbids switching state and allow switching state;

Handover decisions unit 113, be used for switching the switching grade that the switching grade of the source network that grade determining unit 111 determines and described objective network switch the objective network that grade determining unit 112 determines according to described source network, when the switching grade of described source network is necessary switching state or optimization switching state, if the switching grade of described objective network is when allowing switching state, then determine to need to carry out handover operation, if the switching grade of described source network is for need not switching state, then determine not need to carry out handover operation;

Switching notice unit 114 is used for sending the notice of carrying out handover operation when described handover decisions unit 113 determines that according to the handover decisions result needs are carried out handover operation.

Corresponding source network switches grade determining unit 111 and specifically can comprise:

First variable switches grade determining unit 1111, be used for determining each self-corresponding switching grade of one or more switching condition variablees of source network, and exist the switching grade of a switching condition variable correspondence to comprise at least must switching state, optimize switching state and need not switching state;

The first network hierarchy switch unit 1112, be used for switching the switching grade that each self-corresponding switching grade of one or more switching condition variablees that grade determining unit 1111 determines and first fusion rule are determined source network, write down the mode that is transformed into the switching grade of corresponding source network by each self-corresponding switching grade of one or more switching condition variablees in this first fusion rule according to described first variable;

Corresponding objective network switches grade determining unit 112 and specifically can comprise:

Second variable switches grade determining unit 1121, be used for determining each self-corresponding switching grade of one or more switching condition variablees of objective network, and exist the switching grade of a switching condition variable correspondence to comprise at least to forbid switching state and allow switching state;

The second network hierarchy switch unit 1122, be used for switching the switching grade that each self-corresponding switching grade of one or more switching condition variablees that grade determining unit 1121 determines and second fusion rule are determined objective network, write down the mode that is transformed into the switching grade of corresponding objective network by each self-corresponding switching grade of one or more switching condition variablees in this second fusion rule according to described second variable.

The types of variables that corresponding switching condition variable is corresponding different respectively, and the corresponding different switching grade of different typess of variables, the switching grade that promptly different switching condition variablees is corresponding different.

Alternatively, if the optimization switching state in the switching grade of the source network that described source network switching grade determining unit 111 is determined specifically comprises the rank that several are different, the switching grade of the objective network that described objective network switching grade determining unit 112 is determined also comprises not switching state of suggestion, and this advises that switching state does not comprise several different stages; Then this device also comprises fuzzy handover decisions unit 118, the rank of switching state and described source network do not switch the rank of the optimization switching state in the switching grade of the source network that the grade determining unit determines to be used for switching the suggestion of switching grade of the objective network that the grade determining unit determines according to described objective network, determine whether to need to carry out handover operation according to predetermined policy, described predetermined policy comprises: the suggestion in the switching grade of objective network is the corresponding relation between the rank of the optimization switching state in the switching grade of the rank of switching state and source network not, and whether this corresponding relation needs to carry out handover operation; Perhaps, the handover decisions unit in this device also is used in the switching grade of described source network for must switching state, and the switching grade of objective network is determined the execution handover operation when advising not switching state.

Particularly, this device can also comprise objective network selected cell 115, be used for switching the switching grade that the switching grade of the source network that grade determining unit 111 determines and a plurality of described objective network switch the objective network that grade determining unit 112 determines according to described source network, in a plurality of objective networks, select a final goal network, and switch in this final goal network as this source network correspondence.

Alternatively, this device can also comprise handover decisions trigger element 116, be used for determining that according to predetermined trigger condition needs trigger handover decisions, notify described source network to switch grade determining unit 111 and the switching grade of objective network switching grade determining unit 112 definite source networks and the switching grade of objective network, handle to trigger corresponding handover decisions.Corresponding predetermined trigger condition specifically can comprise other predetermined trigger condition of some levels, and corresponding different user terminal and the network performance conditions (as the performance condition of source network and/or the performance condition of objective network etc.) of other predetermined trigger condition of each grade; Alternatively, corresponding handover decisions trigger element 116 can also be used for continuing to meet other the predetermined trigger condition corresponding user terminal of same level and the process of network performance condition, and control only triggers the operation of the switching grade of the switching grade of once carrying out described definite source network and objective network.

Alternatively, in this device, can also comprise Group Decision unit 117, be used for switching the switching rank that switching grade that grade determining unit 111 and objective network switch the switching grade of source network of each user terminal correspondence of the group that grade determining unit 112 determines and objective network is determined each user terminal according to above-mentioned source network; And carry out the order of distributing user terminal resource needed, definite response user terminal handoff request when switching, determine that each user terminal in the group switches at least one operation in the information whether order carried out or definite user terminal be rejected switching according to the switching rank of each user terminal.

The device that the embodiment of the invention provides specifically can be arranged in the integrated decision-making entity, adopts centralized mode by this integrated decision-making entity, according to the switching grade of described source network and the switching grade of described objective network, carries out handover decisions and handles.Perhaps, device in the embodiment of the invention also can be arranged at respectively and constitute the system that realizes switching in the corresponding communication network in the different entities, this system specifically can comprise first decision entity of the switching grade that is used for definite source network, and second decision entity that is used for the switching grade of definite objective network, and, adopt distributed mode in described first decision entity, to carry out handover decisions by communicating by letter between described first decision entity and described second decision entity.That is to say that the part unit in the said apparatus is arranged in first decision entity, another part unit is arranged in second decision entity, so first decision entity and the second decision entity specific implementation function are described in said apparatus, is not described in detail in this.

The Apparatus and system that provides by the invention described above embodiment, thus can realize handover operation accurately, reliably, guaranteed the reasonability of handoff procedure, avoided in communication system, avoiding carrying out handover operation, improved the performance of handover operation.

The above; only for the preferable embodiment of the present invention, protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.So protection scope of the present invention should be as the criterion with the protection range of claim.

Claims

1. realize in the communication network it is characterized in that the method switched, comprising:

According to the switching grade of described source network and the switching grade of described objective network, when the switching grade of described source network is necessary switching state or optimization switching state, if the switching grade of described objective network is when allowing switching state, then determine to carry out handover operation, if objective network is for forbidding switching state, then determine not carry out handover operation, when the switching grade of described source network when need not switching state, then definite handover operation of not carrying out;

2. method according to claim 1 is characterized in that,

The step of the switching grade of described definite source network comprises: determine each the self-corresponding switching grade of one or more switching condition variablees in the source network; Determine the switching grade of source network to have write down the mode that is transformed into the switching grade of corresponding source network by each self-corresponding switching grade of one or more switching condition variablees in this first fusion rule according to each self-corresponding switching grade of one or more switching condition variablees and first fusion rule;

The step of the switching grade of described definite objective network comprises: determine each the self-corresponding switching grade of one or more switching condition variablees in the objective network; Determine the switching grade of objective network to have write down the mode that is transformed into the switching grade of corresponding objective network by each self-corresponding switching grade of one or more switching condition variablees in this second fusion rule according to each self-corresponding switching grade of one or more switching condition variablees and second fusion rule.

3. method according to claim 2 is characterized in that,

Switching condition variable in the described source network comprises: be used for characterizing the source network performance at least one parameter, be used to characterize at least one parameter of user terminal performance and be used to characterize one of at least one parameter of operation information or multinomial;

Switching condition variable in the described objective network comprises: at least one parameter that is used to characterize the objective network performance.

4. method according to claim 2 is characterized in that, the types of variables that described switching condition variable is corresponding different respectively, and the corresponding different switching grade of different typess of variables.

5. according to claim 1,2,3 or 4 described methods, it is characterized in that, optimization switching state in the switching grade of described source network specifically comprises the rank that several are different, the switching grade of described objective network also comprises not switching state of suggestion, and described suggestion not switching state comprise several different stages; Then this method also comprises:

When the switching grade of described source network for optimizing switching state, the switching grade of objective network is when advising not switching state, then according to the rank of the optimization switching state in the switching grade of the rank of switching state and source network not of the suggestion in the switching grade of objective network, determine whether to carry out handover operation according to predetermined policy, described predetermined policy comprises: the suggestion in the switching grade of objective network is the corresponding relation between the rank of the optimization switching state in the switching grade of the rank of switching state and source network not, and whether this corresponding relation carries out handover operation;

Perhaps,

When the switching grade of described source network is must switching state, the switching grade of objective network is determined the execution handover operation when advising not switching state.

6. according to claim 1,2,3 or 4 described methods, it is characterized in that this method also comprises:

According to the switching grade of described source network and the switching grade of described objective network, carry out handover decisions by the integrated decision-making entity of appointment;

Perhaps,

Determine the switching grade of described source network by first decision entity, second decision entity is determined the switching grade of described objective network, and carries out handover decisions by communication between described first decision entity and described second decision entity.

7. according to claim 1,2,3 or 4 described methods, it is characterized in that this method also comprises:

According to the switching grade of described source network and the switching grade of a plurality of described objective networks, in a plurality of objective networks, select a final goal network, and switch in this final goal network as this source network correspondence.

8. according to claim 1,2,3 or 4 described methods, it is characterized in that before the switching grade of the switching grade of described definite source network and objective network, this method also comprises:

Determine that according to predetermined trigger condition needs trigger handover decisions, then carry out the step of the switching grade of the switching grade of described definite source network and objective network.

9. method according to claim 8 is characterized in that, described predetermined trigger condition comprises: other predetermined trigger condition of some levels, and corresponding different user terminal and the network performance conditions of other predetermined trigger condition of each grade; And this method also comprises: in the process that is continuing to meet other predetermined trigger condition corresponding user terminal of same level and network performance condition, only trigger the step of the switching grade of the switching grade of once carrying out described definite source network and objective network.

10. according to claim 1,2,3 or 4 described methods, it is characterized in that when carrying out handover operation at group, this method also comprises:

Determine the switching rank of each user terminal according to the switching grade of the switching grade of the source network of each the user terminal correspondence in the group and objective network; And carry out the order of distributing user terminal resource needed, definite response user terminal handoff request when switching, determine that each user terminal in the group switches at least one operation in the information whether order carried out or definite user terminal be rejected switching according to the switching rank of each user terminal.

11. realize device for switching in the communication network, it is characterized in that, comprising:

The switching notice unit is used for when carrying out handover operation, sending the notice of carrying out handover operation as the handover decisions result of described handover decisions unit.

12. device according to claim 11 is characterized in that,

Described source network switches the grade determining unit and specifically comprises:

First variable switches the grade determining unit, is used for determining each self-corresponding switching grade of one or more switching condition variablees of source network;

The first network hierarchy switch unit, be used for switching the switching grade that each self-corresponding switching grade of one or more switching condition variablees that the grade determining unit determines and first fusion rule are determined source network, write down the mode that is transformed into the switching grade of corresponding source network by each self-corresponding switching grade of one or more switching condition variablees in this first fusion rule according to described first variable;

Described objective network switches the grade determining unit and specifically comprises:

Second variable switches the grade determining unit, is used for determining each self-corresponding switching grade of one or more switching condition variablees of objective network;

The second network hierarchy switch unit, be used for switching the switching grade that each self-corresponding switching grade of one or more switching condition variablees that the grade determining unit determines and second fusion rule are determined objective network, write down the mode that is transformed into the switching grade of corresponding objective network by each self-corresponding switching grade of one or more switching condition variablees in this second fusion rule according to described second variable.

13. device according to claim 12 is characterized in that, the types of variables that described switching condition variable is corresponding different respectively, and the corresponding different switching grade of different typess of variables.

14. according to claim 11,12 or 13 described devices, it is characterized in that, if the optimization switching state in the switching grade of the source network that described source network switching grade determining unit is determined specifically comprises the rank that several are different, the switching grade that described objective network switches the definite objective network of grade determining unit also comprises not switching state of suggestion, and this advises that switching state does not comprise several different stages; Then this device also comprises fuzzy handover decisions unit, the rank of switching state and described source network do not switch the rank of the optimization switching state in the switching grade of the source network that the grade determining unit determines to be used for switching the suggestion of switching grade of the objective network that the grade determining unit determines according to described objective network, determine whether to carry out handover operation according to predetermined policy, described predetermined policy comprises: the suggestion in the switching grade of objective network is the corresponding relation between the rank of the optimization switching state in the switching grade of the rank of switching state and source network not, and whether this corresponding relation needs to carry out handover operation; Perhaps, the described handover decisions unit in this device also is used in the switching grade of described source network for must switching state, and the switching grade of objective network is determined the execution handover operation when advising not switching state.

15. according to claim 11,12 or 13 described devices, it is characterized in that, this device also comprises the objective network selected cell, be used for switching the switching grade of the definite source network of grade determining unit and the switching grade that a plurality of described objective network switches the definite objective network of grade determining unit according to described source network, in a plurality of objective networks, select a final goal network, and switch in this final goal network as this source network correspondence.

16. according to claim 11,12 or 13 described devices, it is characterized in that, this device also comprises the handover decisions trigger element, be used for determining that according to predetermined trigger condition needs trigger handover decisions, notify described source network switching grade determining unit and objective network to switch the grade determining unit and determine the switching grade of source network and the switching grade of objective network.

17. device according to claim 16 is characterized in that, described predetermined trigger condition comprises: other predetermined trigger condition of some levels, and corresponding different user terminal and the network performance conditions of other predetermined trigger condition of each grade; And described handover decisions trigger element also is used for continuing to meet other the predetermined trigger condition corresponding user terminal of same level and the process of network performance condition, and control only triggers the operation of the switching grade of the switching grade of once carrying out described definite source network and objective network.

18. according to claim 11,12 or 13 described devices, it is characterized in that, this device also comprises the Group Decision unit, is used for switching the switching rank that switching grade that grade determining unit and objective network switch the switching grade of source network of each user terminal correspondence of the group that the grade determining unit determines and objective network is determined each user terminal according to described source network; And carry out the order of distributing user terminal resource needed, definite response user terminal handoff request when switching, determine that each user terminal in the group switches at least one operation in the information whether order carried out or definite user terminal be rejected switching according to the switching rank of each user terminal.

19. an integrated decision-making entity is characterized in that, comprises in aforesaid right requirement 11 to 18 each described communication networks realizing device for switching, this installs according to the switching grade of described source network and the switching grade of described objective network, carries out handover decisions.

20. realize the system switched in the communication network, it is characterized in that, comprise