CN101841878B

CN101841878B - Switch method, device and system in communication network

Info

Publication number: CN101841878B
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: 2013-06-12
Anticipated expiration: 2029-03-16
Also published as: CN101841878A

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 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

Due to 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 to provide corresponding handover mechanism, to complete 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 according to user's selection that in communication network needs switch.When determining to switch, carry out corresponding handover operation and switch in objective network and commence business.For example, because the measurement result of certain measuring-signal surpasses corresponding threshold values, can trigger communication system measurement result is carried out switch decision, to determine whether to carry out corresponding handover operation.

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

For the day by day complicated network switching process in future, above-mentioned simple handover scheme can't obtain balance between the 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, determine to carry out handover operation, if objective network is for forbidding switching state, determine not carry out handover operation, if the switching grade of described source network is when need not switching state, definite handover operation of not carrying out;

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

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

Source network switches the classification 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 switching classification unit, for the switching grade of determining objective network, the switching grade of described objective network comprises at least forbids switching state and allows switching state;

the handover decisions unit, be used for switching according to described source network the switching grade that the switching grade of the source network of the classification unit determining and described objective network switch the objective network of the classification unit determining, 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, determine to carry out handover operation, if objective network is for forbidding switching state, determine not carry out handover operation, when the switching grade of described source network when need not switching state, determine not carry out handover operation,

The switching notice unit is used for sending the notice of execution 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 the device of realizing switching in above-mentioned communication network, 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:

The first decision entity that is used for the switching grade of definite source network, and the 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 the first decision entity and described the second decision entity, in described the 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, determine to carry out handover operation, if objective network is for forbidding switching state, determine not carry out handover operation, when need not switching state, determine not carry out handover operation when the switching grade of described source network.

Can be found out by the technical scheme that the embodiment of the invention described above provides, the switching grade of source network and objective network has been considered on its minute rank ground, 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 for the application of each network, and then improve the validity of handoff algorithms, make and can form balance between user satisfaction and network efficiency.

Description of drawings

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Embodiment

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

The embodiment of the present invention provides a kind of method that realizes switching in 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, determine to need to carry out handover operation, if the switching grade of source network is for need not switching state, 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 present invention, determine that accordingly the process of the switching grade of source network specifically can comprise following treatment step:

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

Wherein, the switching condition variable in corresponding source network can comprise one or more in following parameter: be used for characterizing at least one parameter of source network performance, at least one parameter that is used for characterizing at least one parameter of user terminal performance or is used for characterizing 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 the first fusion rule, recorded 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 present invention, determine that accordingly the process of the switching grade of objective network specifically can comprise following treatment step:

(1) determine each self-corresponding switching grade of one or more switching condition variablees in objective network, and the switching grade that each switching condition variable is corresponding comprises forbids switching state and allows all or part of in switching state, but corresponding all of all switching condition variablees are switched to comprise in grades and forbidden switching state and allow switching state; Wherein, the switching condition variable in corresponding objective network can comprise at least one parameter that characterizes 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 the second fusion rule, recorded 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, corresponding switching condition variable (comprise in the switching condition variable in switching condition variable and the source network in objective network at least a) is corresponding different types of variables respectively, and the switching grade that different typess of variables is corresponding different, namely different switching condition variablees can be divided into different switching grades.

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

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

Alternatively, in the embodiment of the present 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, operate 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 user terminal corresponding to same other predetermined trigger condition of 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 operator, namely the factor of comprehensive two aspects is carried out handover operation, to realize active balance between the two.And, can also in the situation that take into full account the characteristic of 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 present invention is no longer only switched or do not switched, but according to the urgency of switching and switching, the factors such as influence degree of network performance are carried out classification to the result of judgement switching in a scope.Thereby reach the purpose that when switching, overall performance of network is optimized.

The below will be respectively determines the switching grade of source network and determines 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 refers to and must switch, and is force handoff, otherwise may cause the situations such as teleservice will break to occur;

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

The MAY switching state refers to and can switch, 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 refers to be at present normal condition, does not need to carry out handover operation.

In above-mentioned four kinds switch grade, 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, namely 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 division further, for example, can be with the MUST switching state of several grades of MUST switching state Further Division, perhaps, can be also some other source normal conditions of level with source NORMAL state Further Division, etc.

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 refers to and can not switch, and namely forbids switching state, and its reason may can't satisfy the requirement of switching because of network condition;

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

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

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

In above-mentioned four kinds switched grade, 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 division further, for example, can be with the MUST NOT switching state of several grades of MUST NOT switching state Further Division, perhaps, can be also some other target side normal conditions of level with target side NORMAL state Further Division, etc.

In the embodiment of the present invention, specifically can carry out according to the switching condition parameter division of the switching grade of the switching grade of above-mentioned source network and objective network, and then realize handover decisions.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, etc.Make corresponding handover decisions can consider the operation conditions of whole network with the switching condition parameter by wide material sources, and carry out accordingly switch decision, thereby effectively improve the performance of switching.

For 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, one or more in the battery electric quantity of user's side, expense, COS and specific selection business; The state variable of corresponding lower floor can comprise: one or more in position, source network signal strength signal intensity, objective network signal strength signal intensity, source network signal quality, objective network signal quality and translational speed, etc.

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, the below will describe corresponding types of variables.

That is to say, for different switching condition parameters (being the switching condition variable), need to be its definite types of variables that belongs 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.

The below will be respectively describes the concrete meaning of above-mentioned four kinds of different typess of variables:

(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, if can think corresponding poor for negative value belongs to the NORMAL state, namely there is no better available signal; If corresponding poor be on the occasion of, think can cause triggering in the residential quarter of having found better signal, but this triggers and is nonessential handover trigger, namely trigger rank lower (priority is lower), be the MAY switching state; That is to say, also will comprehensively judge other networks (source network and/or objective network) condition in addition on the basis of this triggering.The suggestion that MAY switching state rank improves as optimized network or user terminal performance improvement usually.

Namely only be used for optimizing the switching condition variable of purpose, belong to types of variables I.For example for the signal strength signal intensity of the objective network that detects, if it is better than current network (being source network), think and to be optimized switching, therefore be set as MAY switching state rank, 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 still handoff advice, and does not require the state that must switch.

The switching condition variable that namely this types of variables II is corresponding specifically can be used for proposing to optimize, indicating or suggestion, if but do not switch the interruption that also can not have influence on customer service switching.For example, just can be used as for switching condition variablees such as battery electric quantity or expenses and improve the foundation that the user experiences, but the foundation of itself and nonessential switching, therefore can its highest level be set to the grade of SHOULD switching state, namely 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; If this is because will not cause service disconnection in the situation that the non-constant of signal does not switch, 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 the communication system operation conditions, in order to determine whether to carry out handover operation by comprehensive judgement.

Be that switching condition variable corresponding to types of variables III 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 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 namely 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 the situations such as administrative ownership place for the user, if in range of choice, it is the NORMAL state, if not in range of choice, it 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 MUST switching state or MUST NOT switching state is enforceable triggering rank.

Namely belong to types of variables IV for the switching condition variable with clear and definite either-or boundary.For example, the 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 types of variables IV.

For 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, after the switching condition variable that will be used for handover measurement is defined as the variable of relevant variable type (being defined as types of variables III as the switching condition variable with signal strength signal intensity), also need to define the interval value of corresponding switching condition variable correspondence under different stage.For example, take the signal strength signal intensity variable that belongs to types of variables III as example, because types of variables III has four ranks, therefore need to define respectively four different intervals for this signal strength signal intensity variable, can be (+∞ as shown in Figure 5, 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 for the measurement result of signal strength signal intensity variable, and then determine whether to trigger the handover decisions process one time.Still take the signal strength signal intensity variable as example, 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 be not if signal strength signal intensity normally triggers; Afterwards, just can carry out periodic measurement to signal strength signal intensity, when measured value falls into certain interval (except normal interval, i.e. interval (+∞, a]) time, the handover decisions that just can cause once for this grade triggers, and the urgent degree that the handover decisions that different brackets causes triggers is different.And whether each handover decisions triggers the assessment that will initiate the primary network performance, namely obtains the switching condition variable of source network and objective network, need switch with accurate decision-making.Need to prove, usually for each grade, 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.

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

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

Embodiment one

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

As shown in Figure 6, based on the division result of the switching grade in above-mentioned source network and 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 comprise the following 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 can initiate a handover decisions and trigger.

Whether step 3 meets MUST NOT switching state in the inquiry judging objective network, if meet, 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, 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 belong to the MUST switching state that the measured value level of the switching condition variable of types of variables III class has reached, 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, directly carry out corresponding handover operation, otherwise execution in step 5 is namely carried out corresponding fuzzy decision;

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

Step 5 is obtained the condition (except 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 MUST NOT switching state).

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

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

Corresponding fuzzy decision device can be one, is called comprehensive fuzzy decision device; Perhaps, also can be two, if two, be respectively source fuzzy decision device and objective fuzzy decision-making device, and complete corresponding handover decisions operation by Signalling exchange between source fuzzy decision device and 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 set up the centralized decision table in comprehensive fuzzy decision device, and carry out handover decisions according to this centralized decision table and process.

Particularly, be that centralized decision table (or claiming fuzzy reasoning table) is arranged in source network as a large-scale centralized database.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 objective network, only consider that telephone traffic is example, corresponding centralized decision table is as shown in table 3:

Table 3

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

As 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 processes, comprise: source network is passed in the information unification of all switching condition variablees that measure to obtain of source network and objective network, process to utilize the centralized decision table to carry out centralized decision-making, namely carry out corresponding fuzzy operation and carry out decision-making, then carry out defuzzification and process, to realize handover decisions under the condition of source network and objective network being carried out aggregative equilibrium.Specifically can adopt weighted mean method in corresponding defuzzification processing procedure, also can adopt gravity model appoach, perhaps, also can adopt the mode of maximum membership degree, etc.

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

Step 1, user terminal moves to objective network from source network, if the signal quality of current source network begins to descend, working as corresponding signal quality drops to a certain degree, namely 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 amount corresponding to SHOULD switching state, can initiate corresponding handover decisions operation.

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

Step 3, comprehensive fuzzy decision device is initiated MUST NOT conditional 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 conditional request message, inquire about current running status, and return to MUST NOT condition response message, carrying MUST NOT condition in this message, one or more in the conditions such as congested in Network Abnormal, available bandwidth is inadequate, further, the concrete numerical value that also can comprise Congestion Level SPCC and/or available bandwidth, etc.; At this moment, corresponding comprehensive fuzzy decision device is according to the content judgement of the MUST NOT condition response message of returning, if objective network meets MUST NOT switching state, and direct execution in step 8, otherwise, execution in step 4;

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

Step 5, comprehensive fuzzy decision device sends non-MUST conditional request to source network, with the non-MUST condition (namely other except the MUST switching state switch grade) of query source network; Source network is inquired about current running status and is returned to non-MUST condition response message after receiving this non-MUST conditional 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 non-MUST NOT conditional request to objective network, to inquire about non-MUST NOT condition (namely other except MUST NOT switching state switch grade), after objective network receives this non-MUST NOT conditional request, inquire about current running status and return to non-MUSTNOT condition response message, carrying non-MUST NOT condition in this message, as the value of the network bandwidth, the 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 processed 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, initiate to switch the operation of carrying out, otherwise switching flow finishes.

Embodiment three

In this embodiment three, specifically can set up the decision table of source network in the fuzzy decision device of source, and the decision table of setting up objective network in the objective fuzzy decision-making device, 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, process 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 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 objective network, and only consider that telephone traffic is example, the decision table of the decision table of corresponding source network and objective network is respectively as shown in table 4 and table 5:

Table 4 table 5

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

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 comprise the following steps:

Step 1, user terminal moves to objective network from source network, if the signal quality of source network begins descend and acquire a certain degree, namely 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 initiated the message of handover decisions request to source fuzzy decision device by source network, and then initiated the message of handover decisions request to the objective fuzzy decision-making device by source fuzzy decision device.

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

Step 4, source fuzzy decision device sends non-MUST conditional request to source network, after source network receives non-MUST conditional request, inquires about current running status and returns to 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 for the significance level that expression is 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 conditional request message to objective network, after objective network receives MUST NOT conditional request message, inquire about current running status and return to MUST NOT condition response message, according to the information in MUSTNOT condition response message, if objective network meets MUST NOT switching state, direct execution in step 8, otherwise, execution in step 7.

Step 7, the objective fuzzy decision-making device is initiated non-MUST NOT conditional request message to objective network, after objective network receives non-MUST NOT conditional request message, inquires about current running status and returns to 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 according to Query Result the decision-making that MUST NOT switches, and 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 notification source fuzzy decision device as a result, and according to the operating result execution in step 10 of above-mentioned steps 5.

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

Step 10, source fuzzy decision device carries out handover decisions according to the handover decisions response message that handover decisions result and the objective fuzzy decision-making device of source network sends, namely make switch decision, and send the handover decisions response message to source network, notifying corresponding handover decisions result, and send the handover decisions response message by source network to user terminal; After user terminal is received the handover decisions response message, if need determining switches, initiate to switch the operation of carrying out, otherwise, do not carry out corresponding handover operation, namely 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, near high capacity, if face the switching of a large amount of call business or a large number of users, the percent of call lost or handover failure rate will be higher when the existing network load.For this reason, need user terminal when carrying out network switching selection, consider the network equalization problem, namely the operation conditions according to each heterogeneous networks is evenly distributed to certain customers in adjacent network.user terminal in the cellular network neighbor cell is as example, when this user terminal switches, may face the residential quarter of a plurality of heterogeneous networks, at this moment, just need to select most suitable residential quarter as Target cell, at least comprise aspect needing to consider in selecting the process of most suitable residential quarter: current network performance, following network performance, the load balancing of network, one or more in the Congestion Level SPCC of business and user's experience, the corresponding following network performance can comprise: if an offered load is near high capacity, although 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, consider from the angle of the network performance in future, should switch in the lighter network of corresponding load.

If the switching implementation that adopts optimal network to select, in the time of can also carrying out hand-off process in the floored community that covers, can make the user terminal reasonable distribution in floored community that makes high low speed, thereby make floored community when large capacity, the large covering are provided, hand off signaling in communication system can also be limited in rational scope, 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 comprises the following steps as shown in Figure 9:

Step 1 is identical to the processing procedure of step 9 with step 1 in above-described embodiment 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 in embodiment three;

step 10, source fuzzy decision device is according to the handover decisions result (being the handover decisions response message) of a plurality of objective networks of receiving, the switching grade of a plurality of objective networks is sorted determine optimum network, and the handover decisions result is 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, initiate to switch to the objective network of optimum the operation of carrying out, if determine not need to carry out handover operation, handoff process stops.

Embodiment five

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

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

Step 1, user terminal group moves to objective network from source network, if the signal quality of source network begins descend and acquire a certain degree, namely 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, the handover decisions of can the dispersion user in predetermined time interval stats group initiating triggers, and just can initiate to trigger for the handover decisions of group when meeting predetermined quantitative requirement; Particularly, trigger for the handover decisions of group and can replace endpoint groups to initiate corresponding handover decisions by mobile relay triggering, perhaps, also can deliver the user by mobile relay and initiate corresponding handover decisions and trigger;

In a word, logically, trigger for the handover decisions of group and unifiedly initiated by the group control device, namely represent that by the group control device group initiates corresponding handover decisions and triggers, corresponding group control device can be delivered user etc. for mobile relay or mobile relay.

Step 2, group control device are initiated the message of handover decisions request to source network, so that group's measurement result is reported source network as the switching condition variable; And initiated the message of handover decisions request to source fuzzy decision device by source network, 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 above-described embodiment three that step 9 adopts, and is not described in detail at this, need to prove, mutual MUST conditional request or the message of replying between source fuzzy decision device and source network, and non-MUST conditional request or response message, can be for unified a piece of news (MUST conditional request or the message of replying of adopting of group, perhaps, non-MUST conditional request or response message) complete corresponding function, can be indicated as being the message for group in message, perhaps, also can directly adopt many message corresponding with each user terminal in the group (message that namely adopt respectively a MUST conditional request or reply for each processing procedure of each user terminal respectively, perhaps, non-MUST conditional request or response message) realize corresponding function,

Step 10, after completing the processing procedure of above-mentioned steps 3 to 9, source fuzzy decision device can be according to the fuzzy decision result to each user terminal in group, the sequence of switching grade, and carry 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 the group control device with the handover decisions response message; At last, respectively the handover decisions response message is sent in order as required each user terminal in group by the group control device, and carry out corresponding handover decisions by each user terminal, perhaps, also can directly replace group to carry out handover decisions by the group control device;

The corresponding process of carrying out handover decisions comprises: for the user terminal in the group of needs switching, corresponding user terminal or group control device are initiated corresponding handover operation, for the user terminal in the group that does not need to switch, 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, the switching rank of the switching grade of the source network corresponding according to each user terminal in group and each user terminal of switching classification of objective network is carried out stage of switches to each user terminal other is determined thereby can consider 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: the needed resource of user terminal, the order of replying the order of user terminal handover request, each user terminal switching execution in group and the information whether user terminal is rejected switching when the switching level allocation corresponding according to each user terminal switched, if refusal switches, can also comprise corresponding exclude information, as Reason For Denial etc.

Implementation for group user is switched by grade not only can preferentially satisfy the high user terminal of priority and business, the resource of distributing objective network according to user's rank.Simultaneously, for certain customers' terminal or business, consider that switching lower and finiteness target network resource of rank 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, grade of every arrival, just can carry out the primary network Performance Evaluation, and then carry out corresponding handover decisions and process.

And the embodiment of the present 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 for 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 above-described embodiment method, to come the relevant hardware of instruction to complete by computer program, described program can be stored in a 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 store-memory body (Read-Only Memory, ROM) or random store-memory body (RandomAccess Memory, RAM) etc.

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

Source network switches classification 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 switching classification unit 112, for the switching grade of determining objective network, the switching grade of described objective network comprises at least forbids switching state and allows switching state;

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

Switching notice unit 114 is used for sending the notice of execution 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 switching classification unit 111 specifically can comprise:

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

First network grade switch unit 1112, be used for switching according to described the first variable the switching grade that each self-corresponding switching grade of one or more switching condition variablees of determining classification unit 1111 and the first fusion rule are determined source network, recorded 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;

Corresponding objective network switching classification unit 112 specifically can comprise:

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

Second network grade switch unit 1122, be used for switching according to described the second variable the switching grade that each self-corresponding switching grade of one or more switching condition variablees of determining classification unit 1121 and the second fusion rule are determined objective network, recorded 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.

Corresponding switching condition variable is the different types of variables of correspondence respectively, and switching grade corresponding to different typess of variables, i.e. switching grade corresponding to different switching condition variablees.

alternatively, if the optimization switching state in the switching grade of the source network that described source network switching classification unit 111 is determined specifically comprises the rank that several are different, the switching grade of the objective network that described objective network switching classification unit 112 is determined also comprises not switching state of suggestion, and this advises that switching state does not comprise several different stages, 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 of the classification unit determining to be used for switching the suggestion of switching grade of the objective network of the classification unit determining 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, it be must switching state that the handover decisions unit in this device also is used for switching grade at described source network, the switching grade of objective network when advising not switching state, definite execution handover operation.

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

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 classification unit 111 and objective network and switch classification unit 112 and determine the switching grade of source networks and the switching grade of objective network, process 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 user terminal corresponding to same other predetermined trigger condition of level and the process of network performance condition, controls the operation of the switching grade that only triggers 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 according to above-mentioned source network the switching rank that classification unit 111 and objective network switch each user terminal of switching classification of the switching grade of source network corresponding to each user terminal of the group that determines classification unit 112 and objective network; And carry out the order of distributing the needed resource of user terminal, definite response user terminal handover request when switching, determine that each user terminal in 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 present invention provides specifically can be arranged in the integrated decision-making entity, adopts the 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 processes.Perhaps, device in the embodiment of the present invention also can be arranged at respectively and consist of the system that realizes switching in corresponding communication network in different entities, this system specifically can comprise the first decision entity for the switching grade of determining source network, and the second decision entity that is used for the switching grade of definite objective network, and by communicating by letter between described the first decision entity and described the second decision entity, adopt distributed mode to carry out handover decisions in described the first decision entity.That is to say, the part unit in said apparatus is arranged in the first decision entity, and another part unit is arranged in the second decision entity, therefore the 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 accurately, reliably handover operation, guaranteed the reasonability of handoff procedure, avoided avoiding carrying out handover operation in communication system, improved the performance of handover operation.

The above; only for the better embodiment of the present invention, protection scope of the present invention is not limited to this, 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 are within all should being encompassed in protection scope of the present invention.Therefore protection scope of the present invention should be as the criterion with the protection range of claim.

Claims

1. realize in a 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, determine to carry out handover operation, if objective network is for forbidding switching state, determine not carry out handover operation, when the switching grade of described source network when need not switching state, definite handover operation of not carrying out;

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

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 source network; Determine the switching grade of source network according to each self-corresponding switching grade of one or more switching condition variablees and the first fusion rule, recorded 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;

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 objective network; Determine the switching grade of objective network according to each self-corresponding switching grade of one or more switching condition variablees and the second fusion rule, recorded 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.

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

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

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

3. method according to claim 1, is characterized in that, described switching condition variable is the different types of variables of correspondence respectively, and switching grade corresponding to different typess of variables.

4. according to claim 1,2 or 3 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; The 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, 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.

5. according to claim 1,2 or 3 described methods, is characterized in that, the 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,

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

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

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

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

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

8. method according to claim 7, 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 the method also comprises: in the process that continues to meet user terminal corresponding to same other predetermined trigger condition of 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.

9. according to claim 1,2 or 3 described methods, is characterized in that, when carrying out handover operation for group, the method also comprises:

The switching rank of the switching grade of the source network corresponding according to each user terminal in group and each user terminal of switching classification of objective network; And carry out the order of distributing the needed resource of user terminal, definite response user terminal handover request when switching, determine that each user terminal in 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.

10. realize in a communication network it is characterized in that the device that switches, comprising:

The switching notice unit is used for when the handover decisions result of described handover decisions unit sending the notice of execution handover operation when carrying out handover operation;

Described source network switching classification unit specifically comprises:

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

First network grade switch unit, be used for switching according to described the first variable the switching grade that each self-corresponding switching grade of one or more switching condition variablees of the classification unit determining and the first fusion rule are determined source network, recorded 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;

Described objective network switching classification unit specifically comprises:

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

Second network grade switch unit, be used for switching according to described the second variable the switching grade that each self-corresponding switching grade of one or more switching condition variablees of the classification unit determining and the second fusion rule are determined objective network, recorded 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.

11. device according to claim 10 is characterized in that, described switching condition variable is the different types of variables of correspondence respectively, and switching grade corresponding to different typess of variables.

12. according to claim 10 or 11 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 classification unit is determined specifically comprises the rank that several are different, the switching grade of the objective network that described objective network switching classification unit is determined also comprises not switching state of suggestion, and this advises that switching state does not comprise several different stages, 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 of the classification unit determining to be used for switching the suggestion of switching grade of the objective network of the classification unit determining 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, it be must switching state that the described handover decisions unit in this device also is used for switching grade at described source network, the switching grade of objective network when advising not switching state, definite execution handover operation.

13. according to claim 10 or 11 described devices, it is characterized in that, this device also comprises the objective network selected cell, be used for switching according to described source network the switching grade that the switching grade of the source network of the classification unit determining and a plurality of described objective network switch the objective network of the classifications unit determining, select one as final goal network corresponding to this source network in a plurality of objective networks, and switch in this final goal network.

14. according to claim 10 or 11 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 to switch classification unit and objective network and switch the classification unit and determine the switching grade of source network and the switching grade of objective network.

15. device according to claim 14 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 user terminal corresponding to same other predetermined trigger condition of level and the process of network performance condition, controls the operation of the switching grade that only triggers the switching grade of once carrying out described definite source network and objective network.

16. according to claim 10 or 11 described devices, it is characterized in that, this device also comprises the Group Decision unit, is used for switching according to described source network the switching rank that classification unit and objective network switch each user terminal of switching classification of the switching grade of source network corresponding to each user terminal of the group that the classification unit determines and objective network; And carry out the order of distributing the needed resource of user terminal, definite response user terminal handover request when switching, determine that each user terminal in 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.

17. an integrated decision-making entity is characterized in that, comprises the device of realizing switching in the claims 10 to the 16 described communication networks of any one, this installs according to the switching grade of described source network and the switching grade of described objective network, carries out handover decisions.

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

The first decision entity that is used for the switching grade of definite source network, and the 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 the first decision entity and described the second decision entity, in described the 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, determine to carry out handover operation, if objective network is for forbidding switching state, determine not carry out handover operation, when need not switching state, determine not carry out handover operation when the switching grade of described source network;

Wherein, described the first decision entity determines that the mode of the switching grade of source network comprises: determine each the self-corresponding switching grade of one or more switching condition variablees in source network; Determine the switching grade of source network according to each self-corresponding switching grade of one or more switching condition variablees and the first fusion rule, recorded 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;

Described the second decision entity determines that the mode of the switching grade of objective network comprises: determine each the self-corresponding switching grade of one or more switching condition variablees in objective network; Determine the switching grade of objective network according to each self-corresponding switching grade of one or more switching condition variablees and the second fusion rule, recorded 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.