CN102685807B

CN102685807B - Mobility load balance method, base station and network manager

Info

Publication number: CN102685807B
Application number: CN201210147709.5A
Authority: CN
Inventors: 王波; 乌云霄; 吕召彪; 王健全
Original assignee: China United Network Communications Group Co Ltd
Current assignee: China United Network Communications Group Co Ltd
Priority date: 2012-05-11
Filing date: 2012-05-11
Publication date: 2014-10-22
Anticipated expiration: 2032-05-11
Also published as: CN102685807A

Abstract

The invention provides a mobility load balance (MLB) method, an evolved Node B (eNB) and network manager. The method comprises the following steps that: the eNB of a serving cell receives a current load value and a load threshold value of a neighbor cell; the eNB of the serving cell calculates the load to be transferred of the serving cell; the eNB of the serving cell selects a neighbor cell as a candidate cell, wherein the sum of the load to be transferred of the serving cell and the current load value of the neighbor cell is less than the load threshold value of the neighbor cell; the eNB of the serving cell reports a cell identifier and the current load value of the candidate cell and the load to be transferred of the serving cell to the network manager, and the network manager performs judgment according to a preset load transfer strategy, the loads to be transferred reported by all the eNBs and corresponding to the candidate cell, and the current load value and the load threshold value of the candidate cell, and determines the candidate cell as a target cell when the candidate cell is in line with the load transfer strategy; and the eNB of the serving cell transfers the load to be transferred to the eNB of the target cell. By the MLB method, the eNB and the network manager, network resources can be saved.

Description

Mobile load balancing method, base station and network manager

Technical field

The present invention relates to mobile communication technology, relate in particular to a kind of mobility load balance (Mobility Load Balance is called for short MLB) method, base station (evolved Node B is called for short eNB) and network manager.

Background technology

In Long Term Evolution (Long Term Evolution is called for short LTE) system, often can there is cell-overload situation.For example, in the time that some users in community use large-capacity video stream simultaneously, the bandwidth of Hui Shigai community is used up suddenly.In the LTE initial deployment stage, LTE can supplement technology department as one and be deployed in the hot spot region such as sports buildings, market, in the time being positioned at the community generation overload of these hot spot regions, not only can causing the performance of this community to worsen, but also can cause adverse effect to the performance of peripheral cell.Therefore, in LTE system, need to carry out MLB.

At present, in third generation partner program (3rd Generation Partnership Project is called for short 3GPP) R9 standard, the solution of MLB has been proposed.According to the loading condition of the neighbor cell of Serving cell and this server community, in the time that transship Serving cell, a part of load in this Serving cell is transferred in the lighter neighbor cell of load.

Adopt the above-mentioned MLB method in existing 3GPP R9 standard, when all transship two neighbor cells of Dang Yige community, these two there is Jun Xianggai community, the community transferring load of overload, thereby occur ping-pong, cause the wasting of resources.Fig. 1 is cell load schematic diagram.As shown in Figure 1, under the loading condition shown in Fig. 1, if community A overload, community A need to shift to neighbor cell a part of load.Referring to Fig. 1, community A has two neighbor cells, that is: community B and community D, and community A, through after community B and community D inquiry, knows that the load of community B is lighter than community D, therefore community A shifts a part of load to community B.Now, if community C also transships, community C also needs a part of load to be transferred to community B.The load that community B shifts in order to receive community C, is transferred to community A by a part of load of community B self, thereby causes community A again to transship.Community A starts MLB process again, and a part of load of community A self is transferred to community B again.The load that community B shifts for acceptance area A, a part of load of You Huijiang community B self is transferred to community C, thereby causes community C again to transship.Community C starts MLB process again, and a part of load of community C self is transferred to the MLB process of community B...... between community A, community B, community C again can go on so repeatedly, and this phenomenon is called ping-pong.Existing MLB method can cause ping-pong, causes the serious waste of Internet resources.

Summary of the invention

First aspect of the present invention is to provide a kind of MLB method, in order to solve defect of the prior art, saves Internet resources.

Another aspect of the present invention is to provide a kind of eNB, in order to solve defect of the prior art, saves Internet resources.

Another aspect of the present invention is to provide a kind of network manager, in order to solve defect of the prior art, saves Internet resources.

First aspect of the present invention is to provide a kind of mobility load balance MLB method, comprising:

The base station eNB of Serving cell receives the first cell load state broadcast from the eNB of neighbor cell, and described the first cell load state broadcast comprises: the current load value of described neighbor cell and the load-threshold value of described neighbor cell;

The eNB of described Serving cell is according to the load-threshold value of the current load value of Serving cell and Serving cell, the load capacity to be transferred of calculation services community;

The eNB selection load capacity to be transferred of Serving cell of described Serving cell and the current load value sum of neighbor cell are less than the neighbor cell of the load-threshold value of this neighbor cell, as candidate cell;

The eNB of described Serving cell reports the cell ID of described candidate cell to network manager, the load capacity to be transferred of the current load value of candidate cell and Serving cell, so that described network manager is according to default load transition strategy, the to be transferred load capacity corresponding with described candidate cell that all eNB reports, the current load value of described candidate cell and the load-threshold value of described candidate cell judge, in the time that described candidate cell meets described load transition strategy, determine that described candidate cell is Target cell, eNB to described Serving cell returns to positive acknowledgement message,

The eNB of described Serving cell receives described positive acknowledgement message, to the load capacity to be transferred of the eNB transfer service community of described Target cell.

Method as above, wherein, also comprises:

The eNB of described Serving cell receives the periodically first cell load state broadcast of transmission of eNB of described neighbor cell;

And/or the eNB of described Serving cell receives the first cell load state broadcast that the eNB of described neighbor cell sends in the time that the load of this neighbor cell changes.

Method as above, wherein, the eNB of described Serving cell, after network manager reports cell ID, the current load value of candidate cell and the load capacity to be transferred of Serving cell of described candidate cell, also comprises:

The negative acknowledgment message that the eNB of Serving cell returns according to described network manager, from unselected neighbor cell, the selection load capacity to be transferred of Serving cell and the current load value sum of neighbor cell are less than the neighbor cell of the load-threshold value of this neighbor cell, as candidate cell; Described negative acknowledgment message is returned to the eNB of described Serving cell in the time that described candidate cell does not meet described load transition strategy by network manager.

Method as above, wherein, also comprises:

The eNB of described Serving cell periodically sends the second cell load state broadcast to the eNB of described neighbor cell, and described the second cell load state broadcast comprises: the current load value of Serving cell and the load-threshold value of Serving cell;

And/or, the eNB of described Serving cell sends the second cell load state broadcast to the eNB of described neighbor cell in the time that the load of described Serving cell changes, and described the second cell load state broadcast comprises: the current load value of Serving cell and the load-threshold value of Serving cell.

Method as above, wherein,

In described the first cell load state broadcast, also comprise: life span instruction TTL; Whenever described the first cell load state broadcast is through once forwarding, the value of described TTL subtracts 1, in the time that the TTL in described the first cell load state broadcast is 0, abandons described the first cell load state broadcast;

In described the second cell load state broadcast, also comprise: life span instruction TTL; Whenever described the second cell load state broadcast is through once forwarding, the value of described TTL subtracts 1, in the time that the TTL in described the second cell load state broadcast is 0, abandons described the second cell load state broadcast.

Another aspect of the present invention is to provide a kind of mobility load balance MLB method, comprising:

The cell ID of the candidate cell that the base station eNB of network manager reception Serving cell reports, the load capacity to be transferred of the current load value of candidate cell and Serving cell, described candidate cell is the neighbor cell that the load capacity to be transferred of Serving cell and the current load value sum of neighbor cell are less than the load-threshold value of this neighbor cell, the load capacity to be transferred of described Serving cell is calculated and is obtained according to the load-threshold value of the current load value of Serving cell and Serving cell by the eNB of described Serving cell, the current load value of described neighbor cell and the load-threshold value of neighbor cell are obtained from the first cell load state broadcast of the eNB of the neighbor cell of reception by the eNB of described Serving cell,

The to be transferred load capacity corresponding with described candidate cell, the current load value of described candidate cell and the load-threshold value of described candidate cell that network manager reports according to default load transition strategy, whole eNB judge, in the time that described candidate cell meets described load transition strategy, determine that described candidate cell is Target cell, eNB to described Serving cell returns to positive acknowledgement message, so that the eNB of described Serving cell is to the load capacity to be transferred of the eNB transfer service community of described Target cell.

Method as above, wherein, also comprises:

Described network manager is not in the time that described candidate cell meets described load transition strategy, eNB to described Serving cell returns to negative acknowledgment message, so that the eNB of described Serving cell is from unselected neighbor cell, the selection load capacity to be transferred of Serving cell and the current load value sum of neighbor cell are less than the neighbor cell of the load-threshold value of this neighbor cell, as candidate cell.

Method as above, wherein, described network manager according to default load transition strategy, the to be transferred load capacity corresponding with described candidate cell, the current load value of described candidate cell and the load-threshold value of described candidate cell that all eNB reports judge and comprise:

Described network manager calculates the to be transferred load capacity sum corresponding with candidate cell that whole eNB report, load capacity sum to be transferred and the current load value of described candidate cell are added, obtain the load estimated value of described candidate cell, and the load-threshold value of described load estimated value and described candidate cell is compared, if the load estimated value of described candidate cell is less than the load-threshold value of candidate cell, judge that described candidate cell meets described load transition strategy, if the load estimated value of described candidate cell is more than or equal to the load-threshold value of candidate cell, judge that described candidate cell does not meet described load transition strategy,

Or, described network manager calculates the to be transferred load capacity sum corresponding with candidate cell that whole eNB report, load capacity sum to be transferred and the current load value of described candidate cell are added, obtain the load estimated value of described candidate cell, and the load-threshold value of described load estimated value and described candidate cell is compared, if the load estimated value of described candidate cell is less than the load-threshold value of candidate cell, judge that described candidate cell meets described load transition strategy, if the load estimated value of described candidate cell is more than or equal to the load-threshold value of candidate cell, described network manager is to report whole eNB composition reference set of the to be transferred load capacity corresponding with candidate cell, from the load estimated value of described candidate cell, deduct the maximum load capacity to be transferred that the eNB in reference set reports, obtain the load estimated value after upgrading, from reference set, deduct the eNB of the load capacity to be transferred that reports this maximum, load estimated value after upgrading and the load-threshold value of described candidate cell are compared, if the load estimated value after the renewal of described candidate cell is less than the load-threshold value of candidate cell, whether the eNB that judges the load capacity to be transferred that reports described maximum is the eNB of above-mentioned Serving cell, if, judge that described candidate cell does not meet described load transition strategy, otherwise, judge that described candidate cell meets described load transition strategy, if the load estimated value after the renewal of described candidate cell is more than or equal to the load-threshold value of candidate cell, return to the maximum load capacity to be transferred that the eNB that deducts in reference set reports from the load estimated value of described candidate cell, obtain the load estimated value after upgrading, from reference set, deduct the eNB of the load capacity to be transferred that reports this maximum, the step that the load-threshold value of the load estimated value after upgrading and described candidate cell is compared.

Another aspect of the present invention is to provide a kind of base station eNB, comprising:

The first receiving element, for receiving the first cell load state broadcast from the eNB of neighbor cell, described the first cell load state broadcast comprises: the current load value of described neighbor cell and the load-threshold value of described neighbor cell;

Computing unit, for according to the load-threshold value of the current load value of Serving cell and Serving cell, the load capacity to be transferred of calculation services community;

Selected cell, for selecting the load capacity to be transferred of Serving cell and the current load value sum of neighbor cell to be less than the neighbor cell of the load-threshold value of this neighbor cell, as candidate cell;

Report unit, for report cell ID, the current load value of candidate cell and the load capacity to be transferred of Serving cell of described candidate cell to network manager, so that the to be transferred load capacity corresponding with described candidate cell, the current load value of described candidate cell and the load-threshold value of described candidate cell that described network manager reports according to default load transition strategy, whole eNB judge, in the time that described candidate cell meets described load transition strategy, determine that described candidate cell is Target cell, returns to positive acknowledgement message to described eNB;

The second receiving element, for receiving described positive acknowledgement message, triggers load buanch unit according to described positive acknowledgement message;

Load buanch unit, for according to the triggering of described the second receiving element, to the load capacity to be transferred of the eNB transfer service community of described Target cell.

ENB as above, wherein,

The first cell load state broadcast that described the first receiving element sends in the time that the load of this neighbor cell changes specifically for the first cell load state broadcast of receiving the eNB of described neighbor cell and periodically sending and/or the eNB that receives described neighbor cell.

ENB as above, wherein,

The negative acknowledgment message that described the second receiving element also returns for receiving described network manager, trigger described selected cell according to described negative acknowledgment message, described negative acknowledgment message is returned to the eNB of described Serving cell in the time that described candidate cell does not meet described load transition strategy by network manager;

Described selected cell is also for according to the triggering of described the second receiving element, from unselected neighbor cell, the selection load capacity to be transferred of Serving cell and the current load value sum of neighbor cell are less than the neighbor cell of the load-threshold value of this neighbor cell, as candidate cell.

ENB as above, wherein, also comprises:

Transmitting element, periodically send the second cell load state broadcast for the eNB to described neighbor cell, and/or, in the time that the load of described Serving cell changes, send the second cell load state broadcast to the eNB of described neighbor cell, described the second cell load state broadcast comprises: the current load value of described Serving cell and load-threshold value.

ENB as above, wherein,

Another aspect of the present invention is to provide a kind of network manager, comprising:

Receiving element, the cell ID of the candidate cell reporting for the base station eNB that receives Serving cell, the load capacity to be transferred of the current load value of candidate cell and Serving cell, described candidate cell is the neighbor cell that the load capacity to be transferred of Serving cell and the current load value sum of neighbor cell are less than the load-threshold value of this neighbor cell, the load capacity to be transferred of described Serving cell is calculated and is obtained according to the load-threshold value of the current load value of Serving cell and Serving cell by the eNB of described Serving cell, the current load value of described neighbor cell and the load-threshold value of neighbor cell are obtained from the first cell load state broadcast of the eNB of the neighbor cell of reception by the eNB of described Serving cell,

Control unit, judge for the load capacity to be transferred corresponding with described candidate cell, the current load value of described candidate cell and the load-threshold value of described candidate cell that report according to default load transition strategy, whole eNB, in the time that described candidate cell meets described load transition strategy, determine that described candidate cell is Target cell, eNB to described Serving cell returns to positive acknowledgement message, so that the eNB of described Serving cell is to the load capacity to be transferred of the eNB transfer service community of described Target cell.

Network manager as above, wherein, described control unit is not also in the time that described candidate cell meets described load transition strategy, eNB to described Serving cell returns to negative acknowledgment message, so that the eNB of described Serving cell is from unselected neighbor cell, the selection load capacity to be transferred of Serving cell and the current load value sum of neighbor cell are less than the neighbor cell of the load-threshold value of this neighbor cell, as candidate cell.

Network manager as above, wherein,

The to be transferred load capacity sum corresponding with candidate cell that described control unit reports specifically for calculating whole eNB, load capacity sum to be transferred and the current load value of described candidate cell are added, obtain the load estimated value of described candidate cell, and the load-threshold value of described load estimated value and described candidate cell is compared, if the load estimated value of described candidate cell is less than the load-threshold value of candidate cell, judge that described candidate cell meets described load transition strategy, if the load estimated value of described candidate cell is more than or equal to the load-threshold value of candidate cell, judge that described candidate cell does not meet described load transition strategy,

Or, the to be transferred load capacity sum corresponding with candidate cell that described control unit reports specifically for calculating whole eNB, load capacity sum to be transferred and the current load value of described candidate cell are added, obtain the load estimated value of described candidate cell, and the load-threshold value of described load estimated value and described candidate cell is compared, if the load estimated value of described candidate cell is less than the load-threshold value of candidate cell, judge that described candidate cell meets described load transition strategy, if the load estimated value of described candidate cell is more than or equal to the load-threshold value of candidate cell, described network manager is to report whole eNB composition reference set of the to be transferred load capacity corresponding with candidate cell, from the load estimated value of described candidate cell, deduct the maximum load capacity to be transferred that the eNB in reference set reports, obtain the load estimated value after upgrading, from reference set, deduct the eNB of the load capacity to be transferred that reports this maximum, load estimated value after upgrading and the load-threshold value of described candidate cell are compared, if the load estimated value after the renewal of described candidate cell is less than the load-threshold value of candidate cell, whether the eNB that judges the load capacity to be transferred that reports described maximum is the eNB of above-mentioned Serving cell, if, judge that described candidate cell does not meet described load transition strategy, otherwise, judge that described candidate cell meets described load transition strategy, if the load estimated value after the renewal of described candidate cell is more than or equal to the load-threshold value of candidate cell, again from the load estimated value of described candidate cell, deduct the maximum load capacity to be transferred that the eNB in reference set reports, obtain the load estimated value after upgrading, from reference set, deduct the eNB of the load capacity to be transferred that reports this maximum, load estimated value after upgrading and the load-threshold value of described candidate cell are compared.

From foregoing invention content, make the eNB of current service cell know current load value and the load-threshold value of neighbor cell by the first cell load state broadcast, the eNB of Serving cell first tentatively selected the neighbor cell that can not overload after the load of transfer service community as candidate cell before carrying out load transfer from neighbor cell, then determine and shifting after the load that all eNB require to shift or shifting the eNB of Serving cell and the eNB of other community requires the candidate cell that also can not overload after the load of transfer as Target cell by network manager, thereby avoid after the transferring load of Serving cell, other community is also to same community transferring load, the ping-pong that causes this community overload and cause, thereby avoid the consumption of ping-pong to Internet resources, Internet resources are saved.

Brief description of the drawings

Fig. 1 is cell load schematic diagram;

Fig. 2 is the flow chart of the MLB method of the embodiment of the present invention one;

Fig. 3 is the flow chart of the MLB method of the embodiment of the present invention two;

Fig. 4 is the flow chart of the MLB method of the embodiment of the present invention three;

Fig. 5 is the cell load schematic diagram of the embodiment of the present invention three;

Fig. 6 is the cell load state broadcast structural representation of the embodiment of the present invention three;

Fig. 7 is the structural representation of the eNB of the embodiment of the present invention four;

Fig. 8 is the structural representation of the network manager of the embodiment of the present invention five.

Embodiment

Fig. 2 is the flow chart of the MLB method of the embodiment of the present invention one.As shown in Figure 2, the method comprises following process.

Step 201: the eNB of Serving cell receives the first cell load state broadcast from the eNB of neighbor cell.

In this step, each the first cell load state broadcast comprises the current load value of the neighbor cell that sends this message and the load-threshold value of this neighbor cell.

Step 202: the eNB of Serving cell is according to the load-threshold value of the current load value of Serving cell and Serving cell, the load capacity to be transferred of calculation services community.

Step 203: the eNB selection load capacity to be transferred of Serving cell of Serving cell and the current load value sum of neighbor cell are less than the neighbor cell of the load-threshold value of this neighbor cell, as candidate cell.

Step 204: the eNB of Serving cell reports cell ID, the current load value of candidate cell and the load capacity to be transferred of Serving cell of candidate cell to network manager.

In this step, the eNB of Serving cell reports the cell ID of candidate cell to network manager, the load capacity to be transferred of the current load value of candidate cell and Serving cell, so that described network manager is according to default load transition strategy, the to be transferred load capacity corresponding with described candidate cell that all eNB reports, the current load value of described candidate cell and the load-threshold value of described candidate cell judge, in the time that described candidate cell meets described load transition strategy, determine that described candidate cell is Target cell, eNB to described Serving cell returns to positive acknowledgement message.Wherein, load transition strategy can be: after the load that this candidate cell requires to shift at the eNB that has shifted whole communities, can not overload, or, can also be: this candidate cell can not overload after the load of having shifted the eNB of Serving cell and the eNB of other a part of community requirement transfer.

Step 205: the eNB of Serving cell receives positive acknowledgement message, to the load capacity to be transferred of the eNB transfer service community of Target cell.

In the embodiment of the present invention one, the eNB of neighbor cell informs the current load value of this neighbor cell and the load-threshold value of this neighbor cell by the first cell load state broadcast to the eNB of Serving cell, the eNB of Serving cell selects the neighbor cell of load-threshold value that the load capacity to be transferred of Serving cell and the current load value sum of neighbor cell be less than this neighbor cell as candidate cell and reports network manager, so that network manager is according to default load transition strategy, the to be transferred load capacity corresponding with candidate cell that all eNB reports, the current load value of candidate cell and the load-threshold value of candidate cell judge, in the time that candidate cell meets load transition strategy, determine that this candidate cell is Target cell and carries out load transfer.By knowing current load value and the load-threshold value of neighbor cell, the eNB of Serving cell first tentatively selected the neighbor cell that can not overload after the load of transfer service community as candidate cell before carrying out load transfer from neighbor cell, then determine and shifting after the load that all eNB require to shift or shifting the eNB of Serving cell and the eNB of other community requires the candidate cell that also can not overload after the load of transfer as Target cell by network manager, thereby avoid after the transferring load of Serving cell, other community is also to same community transferring load, the ping-pong that causes this community overload and cause, thereby avoid the consumption of ping-pong to Internet resources, Internet resources are saved.

On the basis of the technique scheme of the embodiment of the present invention one, further, in step 201, the base station eNB of Serving cell can reception of neighboring cell the first cell load state broadcast of periodically sending of eNB, also the first cell load state broadcast that eNB that can reception of neighboring cell sends in the time that the load of this neighbor cell changes, also the first cell load state broadcast that the first cell load state broadcast that eNB that can reception of neighboring cell periodically sends and the eNB of neighbor cell send in the time that the load of this neighbor cell changes.

And the base station eNB of Serving cell also can periodically send the second cell load state broadcast to the eNB of neighbor cell.Particularly, the base station eNB of Serving cell can periodically send the second cell load state broadcast to the eNB of neighbor cell, also can in the time that changing, the load of Serving cell send the second cell load state broadcast to the eNB of neighbor cell, can also both periodically send the second cell load state broadcast to the eNB of neighbor cell, also in the time that the load of Serving cell changes, send the second cell load state broadcast to the eNB of neighbor cell.Above-mentioned the second cell load state broadcast comprises: the current load value of Serving cell and the load-threshold value of Serving cell.

Above-mentioned the first cell load state broadcast adopts identical message format with the second cell load state broadcast, wherein carries respectively the current load value and the load-threshold value that send community corresponding to the base station of this message.Further, in the first cell load state broadcast and the second cell load state broadcast, all also comprise: life span instruction (Time to Live is called for short TTL).Whenever this message is through once forwarding, the value of the TTL in this message subtracts 1, in the time that the TTL in this message is 0, abandons this message.

On the basis of the technique scheme of the embodiment of the present invention one, further, after step 204, also comprise: network manager, in the time that described candidate cell does not meet described load transition strategy, returns to negative acknowledgment message to the eNB of Serving cell.The negative acknowledgment message that the eNB of Serving cell returns according to network manager, from unselected neighbor cell, the selection load capacity to be transferred of Serving cell and the current load value sum of neighbor cell are less than the neighbor cell of the load-threshold value of this neighbor cell, as candidate cell.And then execution above-mentioned steps 204.

Fig. 3 is the flow chart of the MLB method of the embodiment of the present invention two.As shown in Figure 3, the method comprises following process.

Step 301: cell ID, the current load value of candidate cell and the load capacity to be transferred of Serving cell of the candidate cell that the eNB of network manager reception Serving cell reports.

In this step, the load capacity to be transferred that candidate cell is Serving cell and the current load value sum of neighbor cell are less than the neighbor cell of the load-threshold value of this neighbor cell.Wherein, the load capacity to be transferred of Serving cell is calculated and is obtained according to the load-threshold value of the current load value of Serving cell and Serving cell by the eNB of Serving cell, and the current load value of neighbor cell and the load-threshold value of neighbor cell are obtained from the first cell load state broadcast of the eNB of the neighbor cell of reception by the eNB of Serving cell.

Step 302: the to be transferred load capacity corresponding with candidate cell, the current load value of candidate cell and the load-threshold value of candidate cell that network manager reports according to default load transition strategy, whole eNB judge, in the time that candidate cell meets load transition strategy, determine that candidate cell is Target cell, returns to positive acknowledgement message to the eNB of Serving cell.

Wherein, load transition strategy can be: after the load that this candidate cell requires to shift at the eNB that has shifted whole communities, can not overload, or, can also be: this candidate cell can not overload after the load of having shifted the eNB of Serving cell and the eNB of other a part of community requirement transfer.

In this step, network manager returns to positive acknowledgement message to the eNB of Serving cell, so that the eNB of Serving cell is to the load capacity to be transferred of the eNB transfer service community of Target cell.

In the embodiment of the present invention two, network manager, in the time that described candidate cell meets described load transition strategy, determine that this candidate cell is Target cell, thereby the eNB of Serving cell carries out load transfer.Determine and shifting after the load that all eNB require to shift or shifting the eNB of Serving cell and the eNB of other community requires the candidate cell that also can not overload after the load of transfer as Target cell by network manager, thereby avoid after the transferring load of Serving cell, other community is also to same community transferring load, the ping-pong that causes this community overload and cause, thereby avoid the consumption of ping-pong to Internet resources, saved Internet resources.

On the basis of the technique scheme of the embodiment of the present invention two, further, after step 301, network manager is not in the time that described candidate cell meets described load transition strategy, eNB to Serving cell returns to negative acknowledgment message, so that the eNB of Serving cell is from unselected neighbor cell, select the load capacity to be transferred of Serving cell and the current load value sum of neighbor cell to be less than the neighbor cell of the load-threshold value of this neighbor cell, as candidate cell.

Fig. 4 is the flow chart of the MLB method of the embodiment of the present invention three.Fig. 5 is the cell load schematic diagram of the embodiment of the present invention three.In the present embodiment, send to the cell load state broadcast of Serving cell to be called the first cell load state broadcast neighbor cell, send to the cell load state broadcast of neighbor cell to be called the second cell load state broadcast Serving cell, the first cell load state broadcast and the second cell load state broadcast are referred to as to load condition broadcast.Referring to Fig. 4 and Fig. 5, this MLB method comprises following process.

Step 401: the eNB of each community sends to cell load state broadcast the eNB of its neighbor cell.

In this step, particularly, the corresponding Yi Ge of each eNB community, the cell load state broadcast that this eNB sends comprises the load-threshold value of the current load value He Gai community of this community.ENB can be according to detecting the current load value that obtains this community, according to the default load-threshold value that obtains this community.ENB can periodically send this cell load state broadcast.For example, eNB sends cell load state broadcast one time every 5 seconds, detects the current load value that obtains Gai community comprising current time.Or eNB can also be according to Event triggered, send this cell load state broadcast.For example, increase the event that represents that cell load changes, in the time that the load of community corresponding to eNB changes, send cell load state broadcast by this Event triggered eNB.Or eNB can also, periodically sending on the basis of this cell load state broadcast, send this cell load state broadcast according to Event triggered further.For example, increase the event that represents that cell load changes, in the time that the load of community corresponding to eNB changes, send cell load state broadcast by this Event triggered eNB.Still send a cell load state broadcast as example in the concrete mode periodically sending as every 5 seconds, eNB has sent one time cell load state broadcast at the 5th second, subsequently, at the 7th second, eNB detects that the load of community changes, and sends a cell load state broadcast at the 7th second according to Event triggered, subsequently, at the 10th second, eNB sent cell load state broadcast one time again according to the transmission cycle.

Fig. 6 is the cell load state broadcast structural representation of the embodiment of the present invention three.As shown in Figure 6, in this cell load state broadcast, at least comprise following field: cell-of-origin identification field, DAF destination address field, load information field.Wherein, identification field instruction in cell-of-origin sends the mark of the community of this message; It is broadcast that DAF destination address field is indicated this message; The instruction of load information field sends the load condition of the community of this message, comprises the load-threshold value of the current load value He Gai community of this community.Comprise on the basis of cell-of-origin identification field, DAF destination address field and load information field in cell load state broadcast, further, in cell load state broadcast, can also comprise TTL.Whenever this message is through once forwarding, the value of the TTL in this message just subtracts 1, in the time of TTL=0 in message, abandons this message.In embodiments of the present invention, the initial value of TTL is set to 1.

Step 402: the cell load state broadcast that the eNB of the eNB reception of neighboring cell of Serving cell sends.

Through above-mentioned step 401, the eNB of each community all sends cell load state broadcast to the eNB of neighbor cell separately.In step 402, the cell load state broadcast that the eNB of the eNB reception of neighboring cell of Serving cell sends, i.e. the first cell load state broadcast.Wherein, the cell load state broadcast that each eNB sends comprises the load-threshold value of the current load value of the community that this eNB is corresponding and community corresponding to this eNB.In embodiments of the present invention, in Fig. 5, taking community 1 as Serving cell as example.

Step 403: the eNB of Serving cell is according to the load-threshold value of the current load value of Serving cell and Serving cell, the load capacity to be transferred of calculation services community.

In this step, the eNB of Serving cell is according to detecting the current load value that can obtain Serving cell, according to the default load-threshold value that can obtain Serving cell.In the time that current load value is more than or equal to load-threshold value, transship this Serving cell, need to carry out MLB, and eNB is according to the current load value of Serving cell and load-threshold value, deducts load-threshold value by current load value, obtains load capacity to be transferred.In the time that current load value is less than load-threshold value, does not transship this Serving cell, does not need to carry out MLB, and eNB process ends, needn't carry out subsequent step.In the embodiment shown in fig. 5, with Δ ₁represent the load capacity to be transferred of community 1.

After step 403, the eNB of Serving cell selects the load capacity to be transferred of Serving cell and the current load value sum of neighbor cell to be less than the neighbor cell of the load-threshold value of this neighbor cell, as candidate cell, this process specifically comprises the following steps 404 and step 405.

Step 404: the eNB of Serving cell selects a neighbor cell.

In this step, particularly, the eNB of Serving cell can, according to the ascending order of current load value, select a neighbor cell from whole neighbor cells of Serving cell.Or the eNB of Serving cell also can select at random a neighbor cell from whole neighbor cells of Serving cell.

Step 405: the eNB of Serving cell is added the current load value of the neighbor cell of the load capacity to be transferred of Serving cell and current selection, and compares the load-threshold value of addition result and this neighbor cell.

If above-mentioned addition result is less than the load-threshold value of this neighbor cell, execution step 406, using this neighbor cell as candidate cell.

If above-mentioned addition result is more than or equal to the load-threshold value of this neighbor cell, execution step 411.

Step 411: the eNB of Serving cell judges whether to exist unselected neighbor cell.

If so, return to step 404, the eNB of Serving cell selects a neighbor cell from unselected neighbor cell, then performs step 405.

If not, execution step 412.

Step 412: the eNB of Serving cell finishes this MLB process.

Through above-mentioned steps 404, step 405 and step 411, when addition result in step 405 is less than the load-threshold value of this neighbor cell, the eNB of Serving cell chooses a candidate cell from neighbor cell, the load-threshold value current load value of this candidate cell and the load capacity to be transferred of Serving cell and that be less than this candidate cell.Or, through above-mentioned steps 404, step 405, step 411 and step 412, candidate cell all can not be served as in whole neighbor cells of Serving cell, be the load-threshold value current load value of each neighbor cell and the load capacity to be transferred of Serving cell and that be all more than or equal to this neighbor cell, the eNB of Serving cell finishes this MLB process.After step 412, the eNB of Serving cell can be waiting for after Preset Time, or after random wait a period of time, again initiate MLB process, starts to re-execute from step 402.

In the embodiment shown in fig. 5, select neighbor cell to sue for peace and be judged as example so that community 1 is random, the neighbor cell of community 1 comprises community 9, with L ₉represent the current load value of community 9, the eNB of community 1 calculates Δ ₁+ L ₉and, and judge Δ ₁+ L ₉addition result whether be less than the load-threshold value of community 9.In the embodiment shown in fig. 5, with Δ ₁+ L ₉the load-threshold value that is less than community 9 is example, and community 1 is using community 9 as candidate cell.If Δ ₁+ L ₉be more than or equal to the load-threshold value of community 9, the process of above-mentioned summation and judgement is continued other neighbor cell to carry out in community 1, and for example, other neighbor cell can adopt community 5 or community 6 etc.

Step 406: the eNB of Serving cell, using this neighbor cell as candidate cell, reports cell ID, the current load value of candidate cell and the load capacity to be transferred of Serving cell of candidate cell to network manager.

In this step, the addition result that the eNB of Serving cell obtains the judgement in this step 405 is less than the neighbor cell of load-threshold value of this neighbor cell as candidate cell, reports the cell ID of this candidate cell, current load value and the step 403 of candidate cell to calculate the load capacity to be transferred of the Serving cell obtaining to network manager.In the embodiment shown in fig. 5, the eNB of community 1 is to cell ID, the current load value of community 9 and the load capacity Δ to be transferred of community 1 of network manager reporting subdistrict 9 ₁.

After step 406, the to be transferred load capacity corresponding with candidate cell, the current load value of candidate cell and the load-threshold value of candidate cell that network manager reports according to default load transition strategy, whole eNB judge, particularly, enter following steps 407.

Step 407: network manager calculates the to be transferred load capacity sum corresponding with candidate cell that whole eNB report, load capacity sum to be transferred and the current load value of candidate cell are added, obtain the load estimated value of candidate cell, and the load-threshold value of load estimated value and candidate cell is compared.

If the load estimated value of candidate cell is less than the load-threshold value of candidate cell, execution step 408, determines that the candidate cell that the eNB of Serving cell reports is Target cell, returns to positive acknowledgement message to the eNB of Serving cell.

If the load estimated value of candidate cell is more than or equal to the load-threshold value of above-mentioned candidate cell, network manager can adopt any one in following two kinds of processing modes.

If load transition strategy is: can not overload after the load that this candidate cell requires to shift at the eNB that has shifted whole communities, can adopt mode one: network manager directly performs step 409, return to negative acknowledgment message to the eNB of Serving cell.

If load transition strategy is: this candidate cell can not overload after the load of having shifted the eNB of Serving cell and the eNB of other a part of community requirement transfer, can adopt mode two: network manager, according to the to be transferred load capacity corresponding with above-mentioned candidate cell that all eNB reports, further judges.Particularly, in the time that the load estimated value of candidate cell is more than or equal to the load-threshold value of above-mentioned candidate cell, the detailed process of employing mode two comprises: the first step: network manager is to report whole eNB composition reference set of the to be transferred load capacity corresponding with candidate cell.Second step: network manager deducts the maximum load capacity to be transferred that the eNB in reference set reports from the load estimated value of candidate cell, obtain the load estimated value after upgrading, from reference set, deduct the eNB of the load capacity to be transferred that reports this maximum, the load estimated value after upgrading and the load-threshold value of candidate cell are compared.If the load estimated value after the renewal of candidate cell is less than the load-threshold value of candidate cell, carry out the 3rd step.If the load estimated value after the renewal of candidate cell is more than or equal to the load-threshold value of candidate cell, return to execution second step.Network manager is carried out second step again, from the load estimated value of current candidate cell, deduct the maximum load capacity to be transferred that the eNB in current reference set reports, obtain the load estimated value after again upgrading, from current reference set, deduct the eNB of the load capacity to be transferred that wherein reports this maximum, the load estimated value after again upgrading and the load-threshold value of candidate cell are compared.The 3rd step: whether the eNB that judges the load capacity to be transferred that reports this maximum is the eNB of above-mentioned Serving cell.If so, execution step 409, returns to negative acknowledgment message to the eNB of Serving cell.Otherwise execution step 408, determines that the candidate cell that the eNB of Serving cell reports is Target cell, returns to positive acknowledgement message to the eNB of Serving cell.

In Fig. 4, the situation that adopts aforesaid way one is only shown.

Particularly, in step 407, because other each community in this network all adopts the method for the embodiment of the present invention, carry out the process of above-mentioned steps 401 to step 406, in step 407, network manager can receive reporting of all eNB that need to carry out MLB community, and each eNB reports the load capacity to be transferred that comprises GaieNB community, also comprises the corresponding cell ID of candidate cell and the current load value of candidate cell of MLB process that this eNB initiates.Thereby the load capacity to be transferred for same candidate cell that network manager sends all eNB is added, and obtains the to be transferred load capacity sum corresponding with candidate cell that whole eNB report.And network manager is by setting in advance the load-threshold value that obtains each community.In the embodiment shown in fig. 5, network manager reports according to the eNB's of community 1, obtains cell ID, the current load value of community 9 and the load capacity Δ to be transferred of community 1 of community 9 ₁.And, each community of other in this network all adopts the method for the embodiment of the present invention, carry out the process of above-mentioned steps 401 to step 406, in step 407, network manager can receive reporting of all eNB that need to carry out MLB community, network manager reports according to whole eNB's, the load capacity to be transferred that is community 9 by candidate cell is wherein added, obtaining candidate cell is the load capacity sum to be transferred of community 9, and, network manager obtains the current load value of community 9 from the reporting of eNB, according to the load-threshold value that obtains community 9 is set, the load-threshold value that is the load capacity to be transferred sum of community 9 and the current load value sum of community 9 and default community 9 to candidate cell compares.

Step 408: network manager determines that the candidate cell that the eNB of Serving cell reports is Target cell, returns to positive acknowledgement message to the eNB of Serving cell.

In this step, network manager returns to positive acknowledgement message to the eNB of Serving cell, and this message is indicated for the eNB to Serving cell: the candidate cell that the eNB of Serving cell reports is Target cell.After step 408, execution step 410.

Step 409: network manager returns to negative acknowledgment message to the eNB of Serving cell.

In this step, network manager returns to negative acknowledgment message to the eNB of Serving cell, and this message is indicated for the eNB to Serving cell: the candidate cell that the eNB of Serving cell reports can not be served as Target cell.After step 409, execution step 411.

Step 410: the eNB of Serving cell is to the load capacity to be transferred of the eNB transfer service community of Target cell.

In this step, the eNB of Serving cell receives the positive acknowledgement message that in step 408, network manager returns, and the above-mentioned candidate cell reporting taking the eNB of Serving cell is Target cell, load capacity to be transferred is transferred to the eNB of Target cell.

In the embodiment of the present invention three, by knowing current load value and the load-threshold value of neighbor cell, the eNB of Serving cell first tentatively selected the neighbor cell that can not overload after the load of transfer service community as candidate cell before carrying out load transfer from neighbor cell, then determine and shifting after the load that all eNB require to shift or shifting the eNB of Serving cell and the eNB of other community requires the candidate cell that also can not overload after the load of transfer as Target cell by network manager, thereby avoid after the transferring load of Serving cell, other community is also to same community transferring load, the ping-pong that causes this community overload and cause, thereby avoid the consumption of ping-pong to Internet resources, Internet resources are saved.

Fig. 7 is the structural representation of the eNB of the embodiment of the present invention four.As shown in Figure 7, this eNB at least comprises: the first receiving element 71, computing unit 72, selected cell 73, report unit 74, the second receiving element 75 and load buanch unit 76.

Wherein, the first receiving element 71 is for receiving the first cell load state broadcast from the eNB of neighbor cell.The first cell load state broadcast comprises: the current load value of neighbor cell and the load-threshold value of neighbor cell.

Computing unit 72 is for according to the load-threshold value of the current load value of Serving cell and Serving cell, the load capacity to be transferred of calculation services community.Wherein, obtain the current load value of Serving cell and the concrete grammar of load-threshold value and can adopt existing any means to realize, this is not restricted.For example, the current load value of Serving cell can obtain according to detecting, and detection module specifically can be set in eNB, adopts the detection module in eNB to detect acquisition.The load-threshold value of Serving cell can be by arranging acquisition to this eNB in advance.

Selected cell 73 is for selecting the load capacity to be transferred of Serving cell and the current load value sum of neighbor cell to be less than the neighbor cell of the load-threshold value of this neighbor cell, as candidate cell.

Report unit 74 for report cell ID, the current load value of candidate cell and the load capacity to be transferred of Serving cell of candidate cell to network manager, so that the to be transferred load capacity corresponding with candidate cell, the current load value of candidate cell and the load-threshold value of candidate cell that network manager reports according to default load transition strategy, whole eNB judge, in the time that candidate cell meets load transition strategy, determine that candidate cell is Target cell, returns to positive acknowledgement message to eNB.

The second receiving element 75, for receiving this positive acknowledgement message, triggers load buanch unit according to positive acknowledgement message.

Load buanch unit 76 is for according to the triggering of the second receiving element 75, to the load capacity to be transferred of the eNB transfer service community of Target cell.

On the basis of the technique scheme of the embodiment of the present invention four, the first cell load state broadcast that the first cell load state broadcast that the first receiving element 71 periodically sends specifically for the eNB of reception of neighboring cell and/or the eNB of reception of neighboring cell send in the time that the load of this neighbor cell changes.

On the basis of the technique scheme of the embodiment of the present invention four, further, the negative acknowledgment message that the second receiving element 75 also returns for receiving network managing device, according to negative acknowledgment message triggering selection unit 73.This negative acknowledgment message is returned to the eNB of Serving cell in the time that candidate cell does not meet load transition strategy by network manager.Correspondingly, selected cell 73 is also for according to the triggering of the second receiving element 75, from unselected neighbor cell, the selection load capacity to be transferred of Serving cell and the current load value sum of neighbor cell are less than the neighbor cell of the load-threshold value of this neighbor cell, as candidate cell.Wherein, negative acknowledgment message is returned to the eNB of Serving cell in the time that load capacity sum to be transferred and the current load value sum of candidate cell are more than or equal to the load-threshold value of candidate cell by network manager.

On the basis of the technique scheme of the embodiment of the present invention four, further, in this eNB, also comprise: transmitting element 77.Transmitting element 77 periodically sends the second cell load state broadcast for the eNB to neighbor cell, and/or, in the time that changing, the load of Serving cell sends the second cell load state broadcast to the eNB of neighbor cell.Wherein, the second cell load state broadcast comprises: the current load value of Serving cell and load-threshold value.

On the basis of the technique scheme of the embodiment of the present invention four, further, in the first cell load state broadcast, also comprise: life span instruction TTL; Whenever the first cell load state broadcast is through once forwarding, the value of TTL subtracts 1, in the time that the TTL in the first cell load state broadcast is 0, abandons the first cell load state broadcast.In the second cell load state broadcast, also comprise: life span instruction TTL; Whenever the second cell load state broadcast is through once forwarding, the value of TTL subtracts 1, in the time that the TTL in the second cell load state broadcast is 0, abandons the second cell load state broadcast.

In the embodiment of the present invention four, the first cell load state broadcast that the eNB of the first receiving element reception of neighboring cell sends, know the current load value of this neighbor cell and the load-threshold value of this neighbor cell, selected cell is selected the neighbor cell of load-threshold value that the load capacity to be transferred of Serving cell and the current load value sum of neighbor cell be less than this neighbor cell as candidate cell and is reported network manager, so that network manager is according to default load transition strategy, the to be transferred load capacity corresponding with candidate cell that all eNB reports, the current load value of candidate cell and the load-threshold value of candidate cell judge, in the time that candidate cell meets load transition strategy, determine that this candidate cell is Target cell, load buanch unit carries out load transfer to Target cell.Know current load value and the load-threshold value of neighbor cell by the first receiving element, load buanch unit is before carrying out load transfer, selected cell is first tentatively selected the neighbor cell that can not overload after the load of transfer service community as candidate cell from neighbor cell, then determine and shifting after the load that all eNB require to shift or shifting the eNB of Serving cell and the eNB of other community requires the candidate cell that also can not overload after the load of transfer as Target cell by network manager, thereby avoid after the transferring load of Serving cell, other community is also to same community transferring load, the ping-pong that causes this community overload and cause, thereby avoid the consumption of ping-pong to Internet resources, Internet resources are saved.

Fig. 8 is the structural representation of the network manager of the embodiment of the present invention five.As shown in Figure 8, this network manager at least comprises: receiving element 81 and control unit 82.

Wherein, receiving element 81 is for cell ID, the current load value of candidate cell and the load capacity to be transferred of Serving cell of the candidate cell that receives the eNB of Serving cell and report.Wherein, candidate cell is the neighbor cell that the load capacity to be transferred of Serving cell and the current load value sum of neighbor cell are less than the load-threshold value of this neighbor cell, the load capacity to be transferred of Serving cell is calculated and is obtained according to the load-threshold value of the current load value of Serving cell and Serving cell by the eNB of Serving cell, and the current load value of neighbor cell and the load-threshold value of neighbor cell are obtained from the first cell load state broadcast of the eNB of the neighbor cell of reception by the eNB of Serving cell.

Control unit 82 judges for the load capacity to be transferred corresponding with candidate cell, the current load value of candidate cell and the load-threshold value of candidate cell that report according to default load transition strategy, whole eNB, in the time that candidate cell meets load transition strategy, determine that candidate cell is Target cell, eNB to Serving cell returns to positive acknowledgement message, so that the eNB of Serving cell is to the load capacity to be transferred of the eNB transfer service community of Target cell.。

On the basis of the technique scheme of the embodiment of the present invention five, further, control unit 82 is not also in the time that candidate cell meets load transition strategy, eNB to Serving cell returns to negative acknowledgment message, so that the eNB of Serving cell is from unselected neighbor cell, the selection load capacity to be transferred of Serving cell and the current load value sum of neighbor cell are less than the neighbor cell of the load-threshold value of this neighbor cell, as candidate cell.

The to be transferred load capacity sum corresponding with candidate cell that control unit 82 reports specifically for calculating whole eNB, load capacity sum to be transferred and the current load value of candidate cell are added, obtain the load estimated value of candidate cell, and the load-threshold value of load estimated value and candidate cell is compared, if the load estimated value of candidate cell is less than the load-threshold value of candidate cell, judge that candidate cell meets load transition strategy, if the load estimated value of candidate cell is more than or equal to the load-threshold value of candidate cell, judge that candidate cell does not meet load transition strategy,

Or, the to be transferred load capacity sum corresponding with candidate cell that control unit 82 reports specifically for calculating whole eNB, load capacity sum to be transferred and the current load value of candidate cell are added, obtain the load estimated value of candidate cell, and the load-threshold value of load estimated value and candidate cell is compared, if the load estimated value of candidate cell is less than the load-threshold value of candidate cell, judge that candidate cell meets load transition strategy, if the load estimated value of candidate cell is more than or equal to the load-threshold value of candidate cell, network manager is to report whole eNB composition reference set of the to be transferred load capacity corresponding with candidate cell, from the load estimated value of candidate cell, deduct the maximum load capacity to be transferred that the eNB in reference set reports, obtain the load estimated value after upgrading, from reference set, deduct the eNB of the load capacity to be transferred that reports this maximum, load estimated value after upgrading and the load-threshold value of candidate cell are compared, if the load estimated value after the renewal of candidate cell is less than the load-threshold value of candidate cell, judge and report whether the eNB of maximum load capacity to be transferred is the eNB of above-mentioned Serving cell, if, judge that candidate cell does not meet load transition strategy, otherwise, judge that candidate cell meets load transition strategy, if the load estimated value after the renewal of candidate cell is more than or equal to the load-threshold value of candidate cell, again from the load estimated value of candidate cell, deduct the maximum load capacity to be transferred that the eNB in reference set reports, obtain the load estimated value after upgrading, from reference set, deduct the eNB of the load capacity to be transferred that reports this maximum, load estimated value after upgrading and the load-threshold value of candidate cell are compared.

In the embodiment of the present invention five, control unit calculates the to be transferred load capacity sum corresponding with this candidate cell that whole eNB report, in the time that load capacity sum to be transferred is less than the load-threshold value of this candidate cell with the current load value sum of this candidate cell, determine that this candidate cell is Target cell, thereby make the eNB of Serving cell carry out load transfer to Target cell.Determine and shifting after the load that all eNB require to shift or shifting the eNB of Serving cell and the eNB of other community requires the candidate cell that also can not overload after the load of transfer as Target cell by control unit, thereby avoid after the transferring load of Serving cell, other community is also to same community transferring load, the ping-pong that causes this community overload and cause, thereby avoid the consumption of ping-pong to Internet resources, saved Internet resources.

One of ordinary skill in the art will appreciate that: all or part of step that realizes above-mentioned each embodiment of the method can complete by the relevant hardware of program command.Aforesaid program can be stored in a computer read/write memory medium.This program, in the time carrying out, is carried out the step that comprises above-mentioned each embodiment of the method; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CDs.

Finally it should be noted that: above each embodiment, only in order to technical scheme of the present invention to be described, is not intended to limit; Although the present invention is had been described in detail with reference to aforementioned each embodiment, those of ordinary skill in the art is to be understood that: its technical scheme that still can record aforementioned each embodiment is modified, or some or all of technical characterictic is wherein equal to replacement; And these amendments or replacement do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.

Claims

1. a mobility load balance MLB method, is characterized in that, comprising:

The eNB of described Serving cell reports the cell ID of described candidate cell to network manager, the load capacity to be transferred of the current load value of candidate cell and Serving cell, so that described network manager is according to default load transition strategy, the to be transferred load capacity corresponding with described candidate cell that all eNB reports, the current load value of described candidate cell and the load-threshold value of described candidate cell judge, in the time that described candidate cell meets described load transition strategy, determine that described candidate cell is Target cell, eNB to described Serving cell returns to positive acknowledgement message, described load transition strategy is: after the load that described candidate cell requires to shift at the eNB that has shifted whole communities, can not overload, or be: described candidate cell can not overload after the load of having shifted the eNB of Serving cell and the eNB of other a part of community requirement transfer,

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

3. method according to claim 1 and 2, is characterized in that, the eNB of described Serving cell, after network manager reports cell ID, the current load value of candidate cell and the load capacity to be transferred of Serving cell of described candidate cell, also comprises:

4. method according to claim 3, is characterized in that, also comprises:

5. method according to claim 4, is characterized in that,

6. a mobility load balance MLB method, is characterized in that, comprising:

Network manager is according to default load transition strategy, the to be transferred load capacity corresponding with described candidate cell that all eNB reports, the current load value of described candidate cell and the load-threshold value of described candidate cell judge, in the time that described candidate cell meets described load transition strategy, determine that described candidate cell is Target cell, eNB to described Serving cell returns to positive acknowledgement message, so that the eNB of described Serving cell is to the load capacity to be transferred of the eNB transfer service community of described Target cell, described load transition strategy is: after the load that described candidate cell requires to shift at the eNB that has shifted whole communities, can not overload, or be: described candidate cell can not overload after the load of having shifted the eNB of Serving cell and the eNB of other a part of community requirement transfer.

7. method according to claim 6, is characterized in that, also comprises:

8. method according to claim 7, it is characterized in that, described network manager according to default load transition strategy, the to be transferred load capacity corresponding with described candidate cell, the current load value of described candidate cell and the load-threshold value of described candidate cell that all eNB reports judge and comprise:

9. a base station eNB, is characterized in that, comprising:

Report unit, for report the cell ID of described candidate cell to network manager, the load capacity to be transferred of the current load value of candidate cell and Serving cell, so that described network manager is according to default load transition strategy, the to be transferred load capacity corresponding with described candidate cell that all eNB reports, the current load value of described candidate cell and the load-threshold value of described candidate cell judge, in the time that described candidate cell meets described load transition strategy, determine that described candidate cell is Target cell, return to positive acknowledgement message to described eNB, described load transition strategy is: after the load that described candidate cell requires to shift at the eNB that has shifted whole communities, can not overload, or be: described candidate cell can not overload after the load of having shifted the eNB of Serving cell and the eNB of other a part of community requirement transfer,

10. eNB according to claim 9, is characterized in that,

11. according to the eNB described in claim 9 or 10, it is characterized in that,

12. eNB according to claim 11, is characterized in that, also comprise:

13. eNB according to claim 12, is characterized in that,

14. 1 kinds of network managers, is characterized in that, comprising:

Control unit, be used for according to default load transition strategy, the to be transferred load capacity corresponding with described candidate cell that all eNB reports, the current load value of described candidate cell and the load-threshold value of described candidate cell judge, in the time that described candidate cell meets described load transition strategy, determine that described candidate cell is Target cell, eNB to described Serving cell returns to positive acknowledgement message, so that the eNB of described Serving cell is to the load capacity to be transferred of the eNB transfer service community of described Target cell, described load transition strategy is: after the load that described candidate cell requires to shift at the eNB that has shifted whole communities, can not overload, or be: described candidate cell can not overload after the load of having shifted the eNB of Serving cell and the eNB of other a part of community requirement transfer.

15. network managers according to claim 14, is characterized in that,

Described control unit is not also in the time that described candidate cell meets described load transition strategy, eNB to described Serving cell returns to negative acknowledgment message, so that the eNB of described Serving cell is from unselected neighbor cell, the selection load capacity to be transferred of Serving cell and the current load value sum of neighbor cell are less than the neighbor cell of the load-threshold value of this neighbor cell, as candidate cell.

16. network managers according to claim 15, is characterized in that,