CN103152774B - Support the LTE Interface Expanding method and system of distributed freedom load balancing - Google Patents
Support the LTE Interface Expanding method and system of distributed freedom load balancing Download PDFInfo
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Abstract
The invention discloses the LTE Interface Expanding method and system supporting distributed freedom load balancing.The method comprises: source node obtains load state information by periodicity or time triggered formula Signalling exchange from destination node; Described source node, according to described load state information, obtains balanced adaptation parameter by Signalling exchange from this destination node; According to described balanced adaptation parameter, call the destination node that distributed load equalizing algorithm picks is suitable, and the adjusted value calculating correspondence sends to this destination node.Adopt the present invention, can be LTE network broadened bandwidth, increase throughput, Strengthens network data-handling capacity, the flexibility improving network and availability.
Description
Technical field
The present invention relates to LTE network technology, particularly relate to the LTE Interface Expanding method and system supporting distributed freedom load balancing.
Background technology
Along with the development of mobile communication network technology, the requirement of user to mobile communication network performance and function improves constantly, and distributed load equalizing (DLB, DistributedLoadBalancing) as a kind of method for optimizing resources, there is the advantages such as, network ductility strong, non-processor and communication performance bottleneck high without failed central point, local management efficiency.Therefore, the LTE as next generation network technology needs badly the introducing of distributed load equalizing method for optimizing resources to come in.
At present, there is multiple solution in algorithm, machine-processed scheduling theory aspect in the research about distributed load equalizing.But these solutions realize mostly under 2G, 3G experimental situation, and are not suitable for LTE.Distributed load equalizing to be realized under LTE environment, not only need consideration method and flow process, also need the distributed signaling interface (X2 interface) of LTE to provide support.As the upper layer application protocol of X2 interface, although X2AP has certain adjacent cell load information obtain function, it still can not meet the whole demands of various distributed load equalizing to Signalling exchange completely.
Summary of the invention
Based on this, be necessary for the problems referred to above, a kind of LTE Interface Expanding method and system supporting distributed freedom load balancing be provided, a kind of load balancing mode being applicable to LTE can be provided.
Support a LTE Interface Expanding method for distributed freedom load balancing, comprising:
Source node obtains load state information by periodicity or time triggered formula Signalling exchange from destination node;
Described source node, according to described load state information, obtains balanced adaptation parameter by Signalling exchange from this destination node;
According to described balanced adaptation parameter, call the destination node that distributed load equalizing algorithm picks is suitable, and the adjusted value calculating correspondence sends to this destination node.
Correspondingly, a kind of LTE Interface Expanding system supporting distributed freedom load balancing, be made up of source node and destination node, wherein, described source node comprises:
Load monitoring module, for obtaining load state information by periodicity or time triggered formula Signalling exchange from destination node;
The information interaction module be connected with described load monitoring module, for judging that the load of described destination node exceedes the threshold value of himself according to described load state information, obtains balanced adaptation parameter by Signalling exchange from this destination node;
The parameter configuration module be connected with described information interaction module, for according to described balanced adaptation parameter, calls the destination node that distributed load equalizing algorithm picks is suitable, and the adjusted value calculating correspondence sends to this destination node.
Implement the present invention, there is following beneficial effect:
The present invention, according to the joint demand of the distributed load equalizing method of main flow to Signalling exchange, designs general distributed load equalizing flow process.By expansion X2AP interface protocol, to be incorporated in the middle of LTE load balancing process by various load balancing method of adjustment, for LTE network broadened bandwidth, increase throughput, Strengthens network data-handling capacity, the flexibility improving network and availability.
Accompanying drawing explanation
Fig. 1 is the flow chart that the present invention supports the LTE Interface Expanding method of distributed freedom load balancing;
Fig. 2 is each stage schematic diagram that the present invention supports the LTE Interface Expanding method of distributed freedom load balancing;
Fig. 3 is the embodiment flow chart that the present invention supports the LTE Interface Expanding method of distributed freedom load balancing;
Fig. 4 is the embodiment scene schematic diagram that the present invention supports the LTE Interface Expanding method of distributed freedom load balancing;
Fig. 5 is the embodiment time diagram that the present invention supports the LTE Interface Expanding method of distributed freedom load balancing;
Fig. 6 is the schematic diagram that the present invention supports the LTE Interface Expanding system of distributed freedom load balancing;
Fig. 7 is the embodiment flow chart that the present invention supports the LTE Interface Expanding system of distributed freedom load balancing.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, the present invention is described in further detail.
Fig. 1 is the flow chart that the present invention supports the LTE Interface Expanding method of distributed freedom load balancing, comprising:
S101: source node obtains load state information by periodicity or time triggered formula Signalling exchange from destination node;
S102: described source node, according to described load state information, obtains balanced adaptation parameter by Signalling exchange from this destination node;
S103: according to described balanced adaptation parameter, call the destination node that distributed load equalizing algorithm picks is suitable, and the adjusted value calculating correspondence sends to this destination node.
Fig. 2 is each stage schematic diagram that the present invention supports the LTE Interface Expanding method of distributed freedom load balancing.The present invention is introduced below in conjunction with Fig. 1, Fig. 2.
As shown in Figure 2, the present invention proposes a kind of general three-step distributed load balancing flow process first.Distributed load equalizing refers in the mobile communication network, and load-balancing method independently disposes realization on distributed network node, and not and need the centralized control of network management system.Because distributed frame does not exist Centroid, so in balancing procedure, need source node (hereinafter referred to as: source eNB) and destination node (hereinafter referred to as Signalling exchange place eNB).Source eNB is selected the node as load-balancing decision by system, and place eNB is then the node performing distributed load equalizing action under the signaling of source eNB controls, and is generally the neighbours eNB of source eNB.The present invention incorporates existing distributed load equalizing method, proposes more perfect universal distributed load balancing flow process, and the necessary information of Signalling exchange.
Based on the analysis of existing distributed load equalizing, whole flow process is divided into three phases by this patent: monitoring stage, mutual stage and configuration phase.
1, stage, the i.e. perception stage of load state information is monitored.Under the control of load monitoring function, when source eNB monitor own load be about to exceed thresholding time, first the load information of self is informed to place eNB, this process by the existing EP(basic process of 3GPP specification, ElementaryProcedure) " load instruction " come.Afterwards, source eNB obtains necessary load state information by periodicity or time triggered formula information interaction from place eNB.In this process, source eNB asks place eNB to return load information by the existing EP of 3GPP specification " resource status report initialization ", and place eNB returns self load information to source eNB by the existing EP of 3GPP specification " resource status report ".
2, the mutual stage.The i.e. acquisition stage of equalization information.After the load information successfully obtaining place eNB, source eNB obtains the necessary parameter information of execution distributed load equalizing by equalization information interactive function from place eNB.Particularly, first source eNB returns the parameter of formulation to place eNB request by the new EP " equalization information report initialization " introduced.Place eNB periodically returns corresponding parameter value by the new EP " equalization information renewal " introduced to source eNB.
3, configuration phase.Namely equalization methods issue the stage.After the balance parameters information successfully obtaining place eNB, based on the various information obtained, source eNB selects suitable place eNB by parameter configuration function and calculates the value that corresponding balance parameters should adjust, and sends to place eNB.Whether place eNB returns after receiving adjustment information and adjusts successfully.This process has been come by the new EP " parameter upgrades response " introduced.
As the application layer protocol of the X2 interface between eNB, the application that X2AP is responsible between adjacent eNB is mutual, and is completed by a series of EP.In the various stages, relate to 6 EP in this patent altogether: " loading process ", " resource status report initialization ", " resource status report ", " equalization information report initialization ", " equalization information renewal ", and " parameter upgrades response ".Wherein " equalization information report initialization ", " equalization information renewal " and " parameter upgrade response " belong to the EP that this patent is newly expanded.Here, the extended mode to general X2AP interface protocol is related to.
In LTE, X2 interface is the information interactive interface between each eNB.As the top level control application protocol of X2 protocol stack, X2AP comprises 6 functions: mobile management, load management, general error situation report, X2 resets, X2 sets up, eNB config update.In these management functions, load management function provides part support to distributed load equalizing method, comprises 3 EP such as " Load notification ", " resource status report initialization ", " resource status report ".EP is divided into two classes: needs response Class1 and do not need response type 2.EP for Class1 forms with failed operation by successfully operating again.Each operation comprises again some message.Table 1 gives the title that EP is correlated with in the distributed equilibrium adopted in this patent, and type, comprises the contents such as message.For supporting distributed load equalizing, 3 EP of this patent new expansion on X2AP interface: equalization information report initialization, equalization information report and parameter updating record are respectively Class1, type 2 and Class1.
Table 1 distributed load equalizing is correlated with EP
Fig. 3 is the embodiment flow chart that the present invention supports the LTE Interface Expanding method of distributed freedom load balancing; Compared to Figure 1, the embodiment flow chart of Fig. 3 has carried out illustrated in greater detail to above-mentioned each expansion EP.
S201: source node obtains load state information by periodicity or time triggered formula Signalling exchange from destination node;
S202: described source node is according to described load state information, and described destination node receives described equalization information and reports that initialized load indicates;
S203: determine to measure operation accordingly according to arranging of the registration request cell in this load Indication message;
S204: described destination node sends the load instruction of described equalization information renewal to described source node, this load instruction, except comprising type of message, the ID of described source node, the ID of described destination node, also comprises at least one item in community ID, reference signal, mechanical inferior horn, electrical tilt angle, antenna permutation, HOM value five cell measurement results;
S205: according to described balanced adaptation parameter, call the destination node that distributed load equalizing algorithm picks is suitable, and the adjusted value calculating correspondence sends to this destination node;
S206: described destination node returns to described source node the load instruction that described parameter upgrades response.
One, " equalization information report initialization " EP
Expand the upper layer application protocol X2AP of the X2 interface based on LTE, formulate equalization information and report that initialized load indicates, this load instruction is used for the relevant parameter of described source node to described destination node acquisition request holding load equilibrium calculation;
Described destination node receive described equalization information report initialized load instruction after, determine to measure operation accordingly according to arranging of the registration request cell in this load Indication message;
When the measurement that this destination node has no requirement can be initialised, it returns equalization information failure to described source node;
This EP is used for the relevant parameter that source eNB calculates to place eNB acquisition request holding load equalization methods.This process uses the signaling that non-user is relevant.As the EP of Class1, this process comprises Successful Operation and failure operation two kinds of examples.With reference to 3GPP specification, this patent gives the Successful Operation of this EP, and failure operation and abnormal conditions describe.
The situation of a, Successful Operation
The message " equalization information request " being issued place eNB by source eNB carrys out initialization.Upon receiving the message, place eNB according to " registration request " IE(cell in message, InformationElement) settings determine corresponding measurement action.When this IE value is " beginning ", the balance parameters that place eNB starts needed for execution is measured; If this IE value is " stopping ", then stops all measurements and stop report.
If " registration request " IE value is " beginning ", then " IE should be comprised in equalization information request information: " equalization information feature ".Meanwhile, to each community of place eNB, following information should be comprised in " equalization information renewal " message:
" reference signal power instruction " IE, if " the equalization information feature " of source eNB first (characterizing " cell reference signals transmitting power ") bit is set to 1;
" mechanical tilt instruction " IE, if " the equalization information feature " of source eNB second (characterizing " mechanical tilt angle ") bit is set to 1;
" electric slope angle instruction " IE, if " the equalization information feature " of source eNB the 3rd (characterizing " electrical tilt angle ") bit is set to 1;
" instruction of antenna pattern " IE, if the 4th bit of " the equalization information feature " of source eNB (characterizing " antenna pattern arrays ") is set to 1;
" HOM instruction " IE, if the 5th bit of " the equalization information feature " of source eNB (characterizing " HOM ") is set to 1.
If " comprise " periodic report " IE in equalization information request information, then the interval that this value should be reported as two continuous measurements of place eNB.
If place eNB can provide all equalization information, then the measurement needed for the eNB of initialization source, and return to source eNB by message " equalization information response ".
If place eNB is merely able to provide part but not all required equalization information.Then should comprise " part successfully indicates " cell in the eNB of source.Source eNB can by this cell for the measurement target initialization survey process allowed." measurement initialization result " IE should be comprised in " equalization information response " message of place eNB.
If place eNB receive source eNB " " registration request " information in equalization information request information is set to " termination ", then " return community " IE in this message can directly be left in the basket.
As following table 2, the 3 message IE that sets forth " equalization information request " and " equalization information response " define.
" equalization information request information defines table 2
Table 3 " equalization information response " message defines
The situation of b, failure operation
The measurement that place eNB has no requirement can be initialised, and it should return " equalization information failure " message to source eNB." reason " IE in message should return a suitable value for each measuring object, such as, " measure temporarily unavailable ", or " measure and do not support this object " etc.In " equalization information failure " message, place eNB also can strengthen description to each measurement failure cause by " complete failure cause information " IE.
As following table 4 gives the message definition of " equalization information failure ".
Table 4 " equalization information failure " message definition
C, abnormal conditions
When described source node do not receive the message of described balanced message response, described source node return equalization information failure time, again send described equalization information to this destination node and report that initialized load indicates;
In the message of the described balanced message response received when described source node, comprise default equilibrium failure abnormal information, then judge this procedure failure.
If source eNB does not both receive " equalization information response ", message did not also receive " equalization information failure " message.Then source eNB then can restart once " equalization information report initialization " EP process to place eNB, and makes that new " content of equalization information request information is consistent with the content of unacknowledged " the equalization information request " that send before.
If " measurement initialization result " IE that " equalization information response " message that source eNB receives comprises does not comprise the measurement of permission, then source eNB will be understood that this procedure failure.
If source eNB " all bit place values of " equalization information feature " IE in equalization information request information are " 0 ".Then place eNB also should initialization one " equalization information failure " message return to source eNB.Reason also should be set to suitable value, such as " equalization information is reported as sky ".
If " periodic report " IE does not have designated value, but have a bit at least for being set to " 1 " in " equalization information feature " IE, then place eNB also should return " equalization information failure " message, and reason also should be set to suitable value, such as " without reporting period ".
If place eNB receive come from source eNB " in equalization information request information, " registration request " IE is set to " beginning ", and " source eNB measures ID " in message is reported relevant to an ongoing load measure.Then place eNB should return the message of one " equalization information failure ", and reason also should be set to suitable value, such as, " measure ID to exist ".
If place eNB receive come from source eNB " in equalization information request information, " registration request " IE is set to " termination ", and does not comprise in this message " place eNB measures ID ".Then place eNB should return the message of one " equalization information failure ", and reason also should be set to suitable value, such as " position eNB measures ID ".
Two, " equalization information renewal " EP
The upper layer application protocol X2AP of the X2 interface based on LTE is expanded, formulate the load instruction that equalization information upgrades, this load instruction is used for described destination node feeds back value from the measuring object obtained to described source node, and this measuring object is for reporting set by initialized load instruction according to described equalization information;
Described destination node sends the load instruction of described equalization information renewal to described source node, this load instruction, except comprising type of message, the ID of described source node, the ID of described destination node, also comprises at least one item in community ID, reference signal, mechanical inferior horn, electrical tilt angle, antenna permutation, HOM value five cell measurement results.
After completing one successful " equalization information report initialization ", this process, by place eNB initialization, is used for source eNB report measurement results.This process uses the signaling irrelevant with UE.As the EP of type 2, this process there is no corresponding failure operation, only comprises " resource status renewal " message sent to source eNB by place eNB and forms.
Place eNB should report the value of the measuring object obtained in " equalization information renewal " message to source eNB.These measuring objects are designated when the Successful Operation of " equalization information report initialization " EP.Meanwhile, these measuring object relevant informations also can not obtain corresponding mark in " the measuring failure reporting feature " in " resource status response " message.
As following table 5 gives the message IE definition of " equalization information renewal ".Wherein cell measurement item at least should comprise one of 5 listed parameters.
Table 5 " equalization information renewal " message defines
Three, " parameter updating record " EP
Expand the upper layer application protocol X2AP of the X2 interface based on LTE, formulate the load instruction that parameter upgrades response, this load instruction is used for the adjustment result of feedback equalization parameter;
Described destination node returns to described source node the load instruction that described parameter upgrades response;
When this destination node success adjusts the load balancing parameter of all specifying according to described adjusted value, the load instruction that described parameter upgrades response comprises the feature representing that parameter is updated successfully;
When this destination node success adjusts the load balancing parameter that part is specified according to described adjusted value, the load instruction of described parameter renewal response comprises and represents that parameter upgrades failed feature;
When this destination node can not adjust arbitrary load balancing parameter of specifying according to described adjusted value, described parameter upgrades the load instruction responded and comprises the feature representing that parameter renewal is failed, and also comprises the feature each load balancing parameter being upgraded to failure cause description.
After being successfully completed the mutual stage, the parameter configuration function of source eNB is based on the load of the place eNB got, and the parameter of holding load equilibrium, calculates the adjusted value of these load balancing parameters and sends to place eNB.The result that place eNB needs return parameters to adjust.This EP is used for the parameter information realizing distributed load equalizing between source eNB and place eNB alternately, belongs to the signaling that user has nothing to do.As Class1 EP, place eNB only need return the result of balance parameters adjustment.With reference to 3GPP specification, this patent gives process analysis procedure analysis and the abnormal conditions description of this EP.
Message " parameter updating request " message that process issues place eNB by source eNB carrys out initialization.Upon receiving the message, place eNB determines corresponding parameter adjustment action according to the settings of " update request " IE in message.
" should IE be comprised in equalization information request information: " parameter regeneration characteristics ", characterize each balance parameters needing adjustment.Accordingly, specify each community of the place eNB of undated parameter information for configuration phase, following information should be comprised within the message:
" reference signal power instruction " IE, if " the parameter regeneration characteristics " of source eNB first (characterizing " cell reference signals transmitting power ") bit is set to 1;
" mechanical tilt instruction " IE, if " the parameter regeneration characteristics " of source eNB second (characterizing " mechanical tilt angle ") bit is set to 1;
" electric slope angle instruction " IE, if " the parameter regeneration characteristics " of source eNB the 3rd (characterizing " electrical tilt angle ") bit is set to 1;
" instruction of antenna pattern " IE, if the 4th bit of " the parameter regeneration characteristics " of source eNB (characterizing " antenna pattern arrays ") is set to 1;
" HOM instruction " IE, if the 5th bit of " the parameter regeneration characteristics " of source eNB (characterizing " HOM ") is set to 1.
Note, each bit value of " parameter regeneration characteristics " should with " in equalization information request information, the corresponding bit position value of " equalization information feature " be consistent.
As following table 6 gives the message definition of " parameter updating request ".
Table 6 " parameter updating request " message defines
If the community that place eNB is corresponding all can adjust the load balancing parameter of specifying, then think that parameter configuration is successful, and return to source eNB by message " parameter upgrades response ", the value of " parameter renewal result " IE is 0.
If place eNB can only the adjustment portion load balancing parameter of specifying all adjust.Should comprise " parameter upgrades unsuccessfully " IE in " parameter upgrades response " message of place eNB, and value is 1.
If place eNB has no requirement, load parameter can be adjusted, and comprise " parameter renewal result " IE in its " parameter adjustment response " message that should return to source eNB equally, value is 1.Also should comprise " reason " IE in message, its parameter for each requirement adjustment returns a suitable value, such as, " upgrade temporarily unavailable ", or " upgrade and do not support this object " etc.In " parameter renewal result " IE, place eNB also can strengthen description to each adjustment failure cause by " complete failure cause information " IE.
For abnormal conditions, if source eNB does not receive " parameter upgrades response " message.Then source eNB then can to place eNB only and start once " equalization information report initialization " EP process again, and the content making new " parameter updating request " message is consistent with the content of unacknowledged " parameter updating request " that send before.
If " parameter renewal result " IE value that " parameter upgrades response " message that source eNB receives comprises is 1, then think that parameter renewal process is failed.
As following table 7 gives the definition of " parameter upgrades response " message.
The definition of table 7 " parameter upgrades response " message
Fig. 4 is the embodiment scene schematic diagram that the present invention supports the LTE Interface Expanding method of distributed freedom load balancing;
Fig. 5 is the embodiment time diagram that the present invention supports the LTE Interface Expanding method of distributed freedom load balancing.
As Fig. 4, Fig. 5 embodiment, be the load-balancing method based on intelligent optimization of the present invention, under LTE environment, achieve a set of signaling time-sequence successfully realizing distributed load equalizing.Whole Signalling exchange sequential is that the Three-stage Model according to Fig. 2 designs.Scene is as shown in Figure 4: it is source node that region one has 4 eNB, eNB0, and eNB1 ~ eNB3 is destination node, comprises three communities under each eNB.
Distributed load equalizing signaling time-sequence as shown in Figure 5.In the monitoring stage, when eNB0 finds that own load is about to exceed thresholding, trigger distributed load equalizing process.First, by X2AP existing " load information " message, own load is informed to destination node eNB1 ~ eNB3.Come by message (1) ~ (3).Afterwards, eNB0 is in conjunction with information such as cell lists, and request destination node eNB1 ~ eNB3 returns its lower all cell load information.This process has been come, as shown in message (4) ~ (12) by X2AP existing " resource status request ", " resource status response " and " resource status renewal " message.Enter the mutual stage.
In the mutual stage, need the community of the eNB1 ~ eNB3 participated in when eNB0 determines to adopt distributed load equalizing, be respectively C12, C23 and C31, and the cell parameter of required adjustment, be respectively reference signal transmitting power and HOM value.Afterwards, and by this patent expand " equalization information request information to eNB1 ~ eNB3 request return designated cell C12; the parameter informations such as the reference information transmitting power of C23 and C31 and HOM value, as shown in message (13) ~ (15).ENB1 ~ eNB3 confirm to measure rear to return " equalization information response " message of this patent expansion to eNB0 after, then according to the time cycle required in " equalization information request ", the relevant parameter information of the respective cell that " equalization information renewal " message expanded by this patent is measured to eNB0 loopback.As shown in message (16) ~ (21).Enter configuration phase afterwards.
At configuration phase, eNB0 calculates designated cell C12 by simulated annealing, the reference signal transmitting power of C23 and C31 and HOM adjusted value, and sends to eNB1 ~ eNB3 by " parameter updating request " message that this patent is expanded.Parameter according to oneself state, is upgraded " parameter upgrades response " message back that result expanded by this patent to eNB0 by eNB1 ~ eNB3, and indicates the whether success of parameter renewal process.
By above flow process, complete the sequential of a distributed load equalizing.
Fig. 6 is the schematic diagram that the present invention supports the LTE Interface Expanding system of distributed freedom load balancing, is made up of source node and destination node, and wherein, described source node comprises:
Load monitoring module, for obtaining load state information by periodicity or time triggered formula Signalling exchange from destination node;
The information interaction module be connected with described load monitoring module, for judging that the load of described destination node exceedes the threshold value of himself according to described load state information, obtains balanced adaptation parameter by Signalling exchange from this destination node;
The parameter configuration module be connected with described information interaction module, for according to described balanced adaptation parameter, calls the destination node that distributed load equalizing algorithm picks is suitable, and the adjusted value calculating correspondence sends to this destination node.
Fig. 6 and Fig. 1 is corresponding, the operational mode of modules and identical in method in figure.
Fig. 7 is the embodiment flow chart that the present invention supports the LTE Interface Expanding system of distributed freedom load balancing.
Wherein in the middle of an embodiment, the upper layer application protocol X2AP of the X2 interface based on LTE is expanded, formulate equalization information and report that initialized load indicates, this load instruction is used for the relevant parameter of described source node to described destination node acquisition request holding load equilibrium calculation; Described destination node, comprising:
The equalization information initialization module be connected with described information interaction module, for receive described equalization information report initialized load instruction after, determine to measure operation accordingly according to arranging of the registration request cell in this load Indication message;
The initialization failure feedback module be connected with described equalization information initialization module, when the measurement for having no requirement at this destination node can be initialised, it returns equalization information failure to described source node;
Wherein in the middle of an embodiment, described information interaction module, comprising:
The initialization retry unit be connected respectively with described equalization information initialization module, described initialization failure feedback module, for not receiving the message of described balanced message response at described source node, described source node is when returning equalization information failure, again sends described equalization information to this destination node and reports that initialized load indicates;
The initialization failure confirmation unit be connected respectively with described initialization failure feedback module, described initialization retry unit, for in the message of described balanced message response that receives at described source node, comprise default equilibrium failure abnormal information, then judge this procedure failure.
Wherein in the middle of an embodiment, the upper layer application protocol X2AP of the X2 interface based on LTE is expanded, formulate the load instruction that equalization information upgrades, this load instruction is used for described destination node feeds back value from the measuring object obtained to described source node, and this measuring object is for reporting set by initialized load instruction according to described equalization information; Described destination node, also comprises:
Be connected to the information updating module between described equalization information initialization module and described parameter configuration module, for sending the load instruction that described equalization information upgrades to described source node, this load instruction, except comprising type of message, the ID of described source node, the ID of described destination node, also comprises at least one item in community ID, reference signal, mechanical inferior horn, electrical tilt angle, antenna permutation, HOM value five cell measurement results.
Wherein in the middle of an embodiment, expand the upper layer application protocol X2AP of the X2 interface based on LTE, formulate the load instruction that parameter upgrades response, this load instruction is used for the adjustment result of feedback equalization parameter; Described destination node, also comprises:
The updating record module be connected with described parameter configuration module, upgrades the load instruction of response for returning described parameter to described source node;
When this destination node success adjusts the load balancing parameter of all specifying according to described adjusted value, the load instruction that described parameter upgrades response comprises the feature representing that parameter is updated successfully;
When this destination node success adjusts the load balancing parameter that part is specified according to described adjusted value, the load instruction of described parameter renewal response comprises and represents that parameter upgrades failed feature;
When this destination node can not adjust arbitrary load balancing parameter of specifying according to described adjusted value, described parameter upgrades the load instruction responded and comprises the feature representing that parameter renewal is failed, and also comprises the feature each load balancing parameter being upgraded to failure cause description.
The above embodiment only have expressed several execution mode of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection range of patent of the present invention should be as the criterion with claims.
Claims (8)
1. support a LTE Interface Expanding method for distributed freedom load balancing, it is characterized in that, comprising:
Source node obtains load state information by periodicity or time triggered formula Signalling exchange from destination node;
Described source node, according to described load state information, obtains balanced adaptation parameter by Signalling exchange from this destination node;
According to described balanced adaptation parameter, call the destination node that distributed load equalizing algorithm picks is suitable, and the adjusted value calculating correspondence sends to this destination node;
Obtained the step of balanced adaptation parameter by Signalling exchange from this destination node, comprising:
Expand the upper layer application protocol X2AP of the X2 interface based on LTE, formulate equalization information and report that initialized load indicates, this load instruction is used for the relevant parameter of described source node to described destination node acquisition request holding load equilibrium calculation;
Described destination node receive described equalization information report initialized load instruction after, determine to measure operation accordingly according to arranging of the registration request cell in this load Indication message;
When the measurement that this destination node has no requirement can be initialised, it returns equalization information failure to described source node.
2. the LTE Interface Expanding method of support distributed freedom load balancing according to claim 1, is characterized in that:
When described source node do not receive the message of described balanced message response, described source node return equalization information failure time, again send described equalization information to this destination node and report that initialized load indicates;
In the message of the described balanced message response received when described source node, comprise default equilibrium failure abnormal information, then judge the failure of equalization information report initialization procedure.
3. the LTE Interface Expanding method of support distributed freedom load balancing according to claim 1, be is characterized in that, obtained the step of balanced adaptation parameter, also comprise by Signalling exchange from this destination node:
The upper layer application protocol X2AP of the X2 interface based on LTE is expanded, formulate the load instruction that equalization information upgrades, this load instruction is used for described destination node feeds back value from the measuring object obtained to described source node, and this measuring object is for reporting set by initialized load instruction according to described equalization information;
Described destination node sends the load instruction of described equalization information renewal to described source node, this load instruction, except comprising type of message, the ID of described source node, the ID of described destination node, also comprises at least one item in community ID, reference signal, mechanical inferior horn, electrical tilt angle, antenna permutation, HOM value five cell measurement results.
4. the LTE Interface Expanding method of the support distributed freedom load balancing according to any one of claims 1 to 3, is characterized in that, calculates after corresponding adjusted value sends to the step of this destination node, also comprises:
Expand the upper layer application protocol X2AP of the X2 interface based on LTE, formulate the load instruction that parameter upgrades response, this load instruction is used for the adjustment result of feedback equalization parameter;
Described destination node returns to described source node the load instruction that described parameter upgrades response;
When this destination node success adjusts the load balancing parameter of all specifying according to described adjusted value, the load instruction that described parameter upgrades response comprises the feature representing that parameter is updated successfully;
When this destination node success adjusts the load balancing parameter that part is specified according to described adjusted value, the load instruction of described parameter renewal response comprises and represents that parameter upgrades failed feature;
When this destination node can not adjust arbitrary load balancing parameter of specifying according to described adjusted value, described parameter upgrades the load instruction responded and comprises the feature representing that parameter renewal is failed, and also comprises the feature each load balancing parameter being upgraded to failure cause description.
5. support a LTE Interface Expanding system for distributed freedom load balancing, be made up of source node and destination node, it is characterized in that, described source node comprises:
Load monitoring module, for obtaining load state information by periodicity or time triggered formula Signalling exchange from destination node;
The information interaction module be connected with described load monitoring module, for judging that the load of described destination node exceedes the threshold value of himself according to described load state information, obtains balanced adaptation parameter by Signalling exchange from this destination node;
The parameter configuration module be connected with described information interaction module, for according to described balanced adaptation parameter, calls the destination node that distributed load equalizing algorithm picks is suitable, and the adjusted value calculating correspondence sends to this destination node;
Expand the upper layer application protocol X2AP of the X2 interface based on LTE, formulate equalization information and report that initialized load indicates, this load instruction is used for the relevant parameter of described source node to described destination node acquisition request holding load equilibrium calculation; Described destination node, comprising:
The equalization information initialization module be connected with described information interaction module, for receive described equalization information report initialized load instruction after, determine to measure operation accordingly according to arranging of the registration request cell in this load Indication message;
The initialization failure feedback module be connected with described equalization information initialization module, when the measurement for having no requirement at this destination node can be initialised, it returns equalization information failure to described source node.
6. the LTE Interface Expanding system of support distributed freedom load balancing according to claim 5, is characterized in that, described information interaction module, comprising:
The initialization retry unit be connected respectively with described equalization information initialization module, described initialization failure feedback module, for not receiving the message of described balanced message response at described source node, described source node is when returning equalization information failure, again sends described equalization information to this destination node and reports that initialized load indicates;
The initialization failure confirmation unit be connected respectively with described initialization failure feedback module, described initialization retry unit, for in the message of described balanced message response that receives at described source node, comprise default equilibrium failure abnormal information, then judge the failure of equalization information report initialization procedure.
7. the LTE Interface Expanding system of support distributed freedom load balancing according to claim 5, it is characterized in that, the upper layer application protocol X2AP of the X2 interface based on LTE is expanded, formulate the load instruction that equalization information upgrades, this load instruction is used for described destination node feeds back value from the measuring object obtained to described source node, and this measuring object is for reporting set by initialized load instruction according to described equalization information; Described destination node, also comprises:
Be connected to the information updating module between described equalization information initialization module and described parameter configuration module, for sending the load instruction that described equalization information upgrades to described source node, this load instruction, except comprising type of message, the ID of described source node, the ID of described destination node, also comprises at least one item in community ID, reference signal, mechanical inferior horn, electrical tilt angle, antenna permutation, HOM value five cell measurement results.
8. the LTE Interface Expanding system of the support distributed freedom load balancing according to any one of claim 5 to 7, it is characterized in that, the upper layer application protocol X2AP of the X2 interface based on LTE is expanded, formulate the load instruction that parameter upgrades response, this load instruction is used for the adjustment result of feedback equalization parameter; Described destination node, also comprises:
The updating record module be connected with described parameter configuration module, upgrades the load instruction of response for returning described parameter to described source node;
When this destination node success adjusts the load balancing parameter of all specifying according to described adjusted value, the load instruction that described parameter upgrades response comprises the feature representing that parameter is updated successfully;
When this destination node success adjusts the load balancing parameter that part is specified according to described adjusted value, the load instruction of described parameter renewal response comprises and represents that parameter upgrades failed feature;
When this destination node can not adjust arbitrary load balancing parameter of specifying according to described adjusted value, described parameter upgrades the load instruction responded and comprises the feature representing that parameter renewal is failed, and also comprises the feature each load balancing parameter being upgraded to failure cause description.
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