CN102685807A

CN102685807A - Mobility load balance method, evolved Node B and network manager

Info

Publication number: CN102685807A
Application number: CN2012101477095A
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: 2012-09-19
Anticipated expiration: 2032-05-11
Also published as: CN102685807B

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

Moving load equalization methods, base station and network manager

Technical field

The present invention relates to mobile communication technology, relate in particular to a kind of moving load balanced (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, through regular meeting the cell-overload situation takes place.For example, when some users in the sub-district use large-capacity video stream simultaneously, the bandwidth of this sub-district is used up suddenly.In the LTE initial deployment stage; LTE can be deployed in hot spot regions such as sports buildings, market as a kind of additional technology department; When overload takes place in the sub-district that is positioned at these hot spot regions, not only can cause the mis-behave of this sub-district, but also can cause adverse effect the performance of peripheral cell.Therefore, in the LTE system, need 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 sub-district, when Serving cell transships, with a part of load transfer in this Serving cell in the lighter neighbor cell of load.

Adopt the above-mentioned MLB method in the existing 3GPP R9 standard, when two neighbor cells of a sub-district all transshipped, these two sub-districts that overload takes place were all to this sub-district transferring load, thereby ping-pong occurred, caused the wasting of resources.Fig. 1 is the cell load sketch map.As shown in Figure 1, under loading condition shown in Figure 1, if sub-district A overload, sub-district A need shift a part of load to neighbor cell.Referring to Fig. 1, sub-district A has two neighbor cells, that is: sub-district B and sub-district D, and sub-district A know that the load of sub-district B is lighter than sub-district D, so sub-district A shifts a part of load to sub-district B through after inquiring about to sub-district B and sub-district D.At this moment, if sub-district C also transships, sub-district C also need give sub-district B a part of load transfer.Sub-district B gives sub-district A with a part of load transfer of sub-district B self, thereby causes sub-district A to transship once more in order to receive the load that sub-district C shifts.Sub-district A starts the MLB process once more, and a part of load of sub-district A self is shifted to sub-district B once more.The load that sub-district B shifts for acceptance area A can be given sub-district C with a part of load transfer of sub-district B self again, thereby caused sub-district C to transship once more.Sub-district C starts the MLB process once more, and a part of load of sub-district C self is shifted once more to the MLB process of sub-district B...... between sub-district A, sub-district B, sub-district C and can be gone on so times without number, 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 provides a kind of MLB method, in order to solve defective of the prior art, conserve network resources.

Another aspect of the present invention provides a kind of eNB, in order to solve defective of the prior art, conserve network resources.

Another aspect of the present invention provides a kind of network manager, in order to solve defective of the prior art, conserve network resources.

First aspect of the present invention provides the balanced MLB method of a kind of moving load, comprising:

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

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

The load capacity to be transferred of the eNB selection Serving cell of said 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 said Serving cell reports the cell ID of said candidate cell, the current load value of candidate cell and the load capacity to be transferred of Serving cell to network manager; So that said network manager is judged according to the load capacity to be transferred corresponding with said candidate cell, the current load value of said candidate cell and the load-threshold value of said candidate cell that preset load transfer strategy, whole eNB report; When said candidate cell satisfies said load transfer strategy; Confirm that said candidate cell is a Target cell, returns positive acknowledgement message to the eNB of said Serving cell;

The eNB of said Serving cell receives said positive acknowledgement message, the load capacity to be transferred to the eNB of said Target cell transfer service sub-district.

Aforesaid method wherein, also comprises:

The eNB of said Serving cell receives the first cell load state broadcast that the eNB of said neighbor cell periodically sends;

And/or the eNB of said Serving cell receives the first cell load state broadcast that the eNB of said neighbor cell sends when the load of this neighbor cell changes.

Aforesaid method, wherein, the eNB of said Serving cell also comprises after network manager reports the load capacity to be transferred of current load value and Serving cell of cell ID, candidate cell of said candidate cell:

The negative acknowledgment message that the eNB of Serving cell returns according to said network manager; From unselected neighbor cell; The load capacity to be transferred of selection 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; Said negative acknowledgment message is returned to the eNB of said Serving cell when said candidate cell does not satisfy said load transfer strategy by network manager.

Aforesaid method wherein, also comprises:

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

And/or; The eNB of said Serving cell sends the second cell load state broadcast to the eNB of said neighbor cell when the load of said Serving cell changes, comprise in the said second cell load state broadcast: the current load value of Serving cell and the load-threshold value of Serving cell.

Aforesaid method, wherein,

Also comprise in the said first cell load state broadcast: life span indication TTL; Whenever the said first cell load state broadcast through once transmitting, the value of said TTL subtracts 1, when the TTL in the said first cell load state broadcast is 0, abandons the said first cell load state broadcast;

Also comprise in the said second cell load state broadcast: life span indication TTL; Whenever the said second cell load state broadcast through once transmitting, the value of said TTL subtracts 1, when the TTL in the said second cell load state broadcast is 0, abandons the said second cell load state broadcast.

Another aspect of the present invention provides the balanced MLB method of a kind of moving load, comprising:

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 base station eNB of network manager reception Serving cell reports; Said candidate cell is that the current load value sum of load capacity to be transferred and neighbor cell of Serving cell is less than the neighbor cell of the load-threshold value of this neighbor cell; The load capacity to be transferred of said Serving cell is calculated acquisition by the eNB of said Serving cell according to the current load value of Serving cell and the load-threshold value of Serving cell, and the current load value of said 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 said Serving cell;

Network manager is judged according to the load capacity to be transferred corresponding with said candidate cell, the current load value of said candidate cell and the load-threshold value of said candidate cell that preset load transfer strategy, whole eNB report; When said candidate cell satisfies said load transfer strategy; Confirm that said candidate cell is a Target cell; ENB to said Serving cell returns positive acknowledgement message, so that the eNB of said Serving cell is to the load capacity to be transferred of the eNB of said Target cell transfer service sub-district.

Aforesaid method wherein, also comprises:

When said network manager does not satisfy said load transfer strategy at said candidate cell; ENB to said Serving cell returns negative acknowledgment message; So that the eNB of said Serving cell is from unselected neighbor cell; The load capacity to be transferred of selection 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.

Aforesaid method; Wherein, said network manager is according to preset load transfer strategy, all the load-threshold value of current load value and the said candidate cell of the to be transferred load capacity corresponding with said candidate cell that report of eNB, said candidate cell is judged and comprised:

Said network manager calculates the to be transferred load capacity sum corresponding with candidate cell that whole eNB report; With the current load value addition of load capacity sum to be transferred with said candidate cell; Obtain the load estimated value of said candidate cell; And the load-threshold value of said load estimated value and said candidate cell compared, if the load estimated value of said candidate cell, judges that said candidate cell satisfies said load transfer strategy less than the load-threshold value of candidate cell; If the load estimated value of said candidate cell, judges that said candidate cell does not satisfy said load transfer strategy more than or equal to the load-threshold value of candidate cell;

Or; Said network manager calculates the to be transferred load capacity sum corresponding with candidate cell that whole eNB report, and with the current load value addition of load capacity sum to be transferred with said candidate cell, obtains the load estimated value of said candidate cell; And the load-threshold value of said load estimated value and said candidate cell compared; If the load estimated value of said candidate cell, judges that said candidate cell satisfies said load transfer strategy less than the load-threshold value of candidate cell, if the load estimated value of said candidate cell is more than or equal to the load-threshold value of candidate cell; Said network manager is formed reference set with the whole eNB that report the load capacity to be transferred corresponding with candidate cell; From the load estimated value of said candidate cell, deduct the load capacity to be transferred of the maximum that the eNB in the reference set reports, the load estimated value after obtaining to upgrade deducts the eNB of the load capacity to be transferred that reports this maximum from reference set; The load estimated value after upgrading and the load-threshold value of said candidate cell are compared; If the load estimated value after the renewal of said candidate cell, judges whether the eNB of the load capacity to be transferred that reports said maximum is the eNB of above-mentioned Serving cell less than the load-threshold value of candidate cell, if; Judge that said candidate cell does not satisfy said load transfer strategy; Otherwise, judge that said candidate cell satisfies said load transfer strategy, if the load estimated value after the renewal of said candidate cell is more than or equal to the load-threshold value of candidate cell; Return the load capacity to be transferred that from the load estimated value of said candidate cell, deducts the maximum that the eNB in the reference set reports; Load estimated value after upgrading deducts the eNB of the load capacity to be transferred that reports this maximum from reference set, the step that the load-threshold value of load estimated value after upgrading and said candidate cell is compared.

Another aspect of the present invention provides a kind of base station eNB, comprising:

First receiving element is used to receive the first cell load state broadcast from the eNB of neighbor cell, comprises in the said first cell load state broadcast: the current load value of said neighbor cell and the load-threshold value of said neighbor cell;

Computing unit is used for according to the current load value of Serving cell and the load-threshold value of Serving cell the load capacity to be transferred of calculation services sub-district;

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

Report the unit; Be used for reporting the cell ID of said candidate cell, the current load value of candidate cell and the load capacity to be transferred of Serving cell to network manager; So that said network manager is judged according to the load capacity to be transferred corresponding with said candidate cell, the current load value of said candidate cell and the load-threshold value of said candidate cell that preset load transfer strategy, whole eNB report; When said candidate cell satisfies said load transfer strategy; Confirm that said candidate cell is a Target cell, returns positive acknowledgement message to said eNB;

Second receiving element is used to receive said positive acknowledgement message, triggers the load transfer unit according to said positive acknowledgement message;

The load transfer unit is used for the triggering according to said second receiving element, the load capacity to be transferred to the eNB of said Target cell transfer service sub-district.

Aforesaid eNB, wherein,

Said first receiving element specifically is used to receive the first cell load state broadcast that the first cell load state broadcast that the eNB of said neighbor cell periodically sends and/or the eNB that receives said neighbor cell are sent when the load of this neighbor cell changes.

Aforesaid eNB, wherein,

Said second receiving element also is used to receive the negative acknowledgment message that said network manager returns; Trigger said selected cell according to said negative acknowledgment message, said negative acknowledgment message is returned to the eNB of said Serving cell when said candidate cell does not satisfy said load transfer strategy by network manager;

Said selected cell also is used for the triggering according to said second receiving element; From unselected neighbor cell; The load capacity to be transferred of selection 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.

Aforesaid eNB wherein, also comprises:

Transmitting element; Be used for periodically sending the second cell load state broadcast to the eNB of said neighbor cell; And/or; When the load of said Serving cell changes, send the second cell load state broadcast, comprise in the said second cell load state broadcast: the current load value of said Serving cell and load-threshold value to the eNB of said neighbor cell.

Aforesaid eNB, wherein,

Another aspect of the present invention provides a kind of network manager, comprising:

Receiving element; Be used to receive 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 base station eNB of Serving cell reports; Said candidate cell is that the current load value sum of load capacity to be transferred and neighbor cell of Serving cell is less than the neighbor cell of the load-threshold value of this neighbor cell; The load capacity to be transferred of said Serving cell is calculated acquisition by the eNB of said Serving cell according to the current load value of Serving cell and the load-threshold value of Serving cell, and the current load value of said 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 said Serving cell;

Control unit; Be used for judging according to the load capacity to be transferred corresponding, the current load value of said candidate cell and the load-threshold value of said candidate cell that preset load transfer strategy, whole eNB report with said candidate cell; When said candidate cell satisfies said load transfer strategy; Confirm that said candidate cell is a Target cell; ENB to said Serving cell returns positive acknowledgement message, so that the eNB of said Serving cell is to the load capacity to be transferred of the eNB of said Target cell transfer service sub-district.

Aforesaid network manager; Wherein, Said control unit also is used for when said candidate cell does not satisfy said load transfer strategy, returning negative acknowledgment message to the eNB of said Serving cell, so that the eNB of said Serving cell is from unselected neighbor cell; The load capacity to be transferred of selection 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.

Aforesaid network manager, wherein,

Said control unit specifically is used to calculate the to be transferred load capacity sum corresponding with candidate cell that whole eNB report; With the current load value addition of load capacity sum to be transferred with said candidate cell; Obtain the load estimated value of said candidate cell; And the load-threshold value of said load estimated value and said candidate cell compared, if the load estimated value of said candidate cell, judges that said candidate cell satisfies said load transfer strategy less than the load-threshold value of candidate cell; If the load estimated value of said candidate cell, judges that said candidate cell does not satisfy said load transfer strategy more than or equal to the load-threshold value of candidate cell;

Or; Said control unit specifically is used to calculate the to be transferred load capacity sum corresponding with candidate cell that whole eNB report, and with the current load value addition of load capacity sum to be transferred with said candidate cell, obtains the load estimated value of said candidate cell; And the load-threshold value of said load estimated value and said candidate cell compared; If the load estimated value of said candidate cell, judges that said candidate cell satisfies said load transfer strategy less than the load-threshold value of candidate cell, if the load estimated value of said candidate cell is more than or equal to the load-threshold value of candidate cell; Said network manager is formed reference set with the whole eNB that report the load capacity to be transferred corresponding with candidate cell; From the load estimated value of said candidate cell, deduct the load capacity to be transferred of the maximum that the eNB in the reference set reports, the load estimated value after obtaining to upgrade deducts the eNB of the load capacity to be transferred that reports this maximum from reference set; The load estimated value after upgrading and the load-threshold value of said candidate cell are compared; If the load estimated value after the renewal of said candidate cell, judges whether the eNB of the load capacity to be transferred that reports said maximum is the eNB of above-mentioned Serving cell less than the load-threshold value of candidate cell, if; Judge that said candidate cell does not satisfy said load transfer strategy; Otherwise, judge that said candidate cell satisfies said load transfer strategy, if the load estimated value after the renewal of said candidate cell is more than or equal to the load-threshold value of candidate cell; From the load estimated value of said candidate cell, deduct the load capacity to be transferred of the maximum that the eNB in the reference set reports once more; Load estimated value after upgrading deducts the eNB of the load capacity to be transferred that reports this maximum from reference set, the load estimated value after upgrading and the load-threshold value of said candidate cell are compared.

Visible by the foregoing invention content; Make the eNB of current service cell know the current load value and the load-threshold value of neighbor cell through the first cell load state broadcast; The eNB of Serving cell is carrying out from neighbor cell, tentatively selecting earlier before the load transfer neighbor cell that can not overload after the load of transfer service sub-district as candidate cell; Confirm after having shifted the load that all eNB require to shift through network manager then or shifted the candidate cell that also can not overload after the load that the eNB of eNB and other sub-district of Serving cell requires to shift as Target cell; Thereby avoided after the Serving cell transferring load, other sub-district is also to same sub-district transferring load, causes this sub-district overload and the ping-pong that causes; Thereby avoided the consumption of ping-pong, practiced thrift Internet resources Internet resources.

Description of drawings

Fig. 1 is the cell load sketch map;

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

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

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

Fig. 5 is the cell load sketch map of the embodiment of the invention three;

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

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

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

Embodiment

Fig. 2 is the flow chart of the MLB method of the embodiment of the invention one.As shown in Figure 2, this 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, comprise the current load value of the neighbor cell that sends this message and the load-threshold value of this neighbor cell in each first cell load state broadcast.

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

Step 203: the load capacity to be transferred of the eNB selection 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 the cell ID of candidate cell, the current load value of candidate cell and the load capacity to be transferred of Serving cell to network manager.

In this step; The eNB of Serving cell reports the cell ID of candidate cell, the current load value of candidate cell and the load capacity to be transferred of Serving cell to network manager; So that said network manager is judged according to the load capacity to be transferred corresponding with said candidate cell, the current load value of said candidate cell and the load-threshold value of said candidate cell that preset load transfer strategy, whole eNB report; When said candidate cell satisfies said load transfer strategy; Confirm that said candidate cell is a Target cell, returns positive acknowledgement message to the eNB of said Serving cell.Wherein, Can not overload after the load that the load transfer strategy can require to shift at the eNB that has shifted whole sub-districts for: this candidate cell; Perhaps, can also after the load that the eNB of the eNB that has shifted Serving cell and other a part of sub-district requires to shift, can not overload for: this candidate cell.

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

In the embodiment of the 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 through the first cell load state broadcast to the eNB of Serving cell; The current load value sum of load capacity to be transferred and neighbor cell that the eNB of Serving cell selects Serving cell less than the neighbor cell of the load-threshold value of this neighbor cell as candidate cell and report network manager; So that network manager is judged according to 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 preset load transfer strategy, whole eNB report; When candidate cell satisfies the load transfer strategy, confirm that this candidate cell is Target cell and carries out load transfer.Through current load value and the load-threshold value of knowing neighbor cell; The eNB of Serving cell is carrying out from neighbor cell, tentatively selecting earlier before the load transfer neighbor cell that can not overload after the load of transfer service sub-district as candidate cell; Confirm after having shifted the load that all eNB require to shift through network manager then or shifted the candidate cell that also can not overload after the load that the eNB of eNB and other sub-district of Serving cell requires to shift as Target cell; Thereby avoided after the Serving cell transferring load; Other sub-district is also to same sub-district transferring load; The ping-pong that causes this sub-district overload and cause, thus the consumption of ping-pong avoided to Internet resources, practiced thrift Internet resources.

On the basis of the technique scheme of the embodiment of the invention one; Further; In step 201; The base station eNB of Serving cell can reception of neighboring cell the eNB first cell load state broadcast of periodically sending; The first cell load state broadcast that eNB that also can reception of neighboring cell sends when the load of this neighbor cell changes, the first cell load state broadcast that the first cell load state broadcast that eNB that also can reception of neighboring cell periodically sends and the eNB of neighbor cell send when the load of this neighbor cell changes.

And the base station eNB of Serving cell also can periodically be sent the second cell load state broadcast to the eNB of neighbor cell.Particularly; The base station eNB of Serving cell can periodically be sent the second cell load state broadcast to the eNB of neighbor cell; Send the second cell load state broadcast to the eNB of neighbor cell in the time of also can changing in the load of Serving cell; Can also both periodically send the second cell load state broadcast, also when the load of Serving cell changes, send the second cell load state broadcast to the eNB of neighbor cell to the eNB of neighbor cell.Comprise in the above-mentioned second cell load state broadcast: the current load value of Serving cell and the load-threshold value of Serving cell.

The above-mentioned first cell load state broadcast adopts identical message format with the second cell load state broadcast, wherein carries the current load value and the load-threshold value of the base station corresponding district of sending this message respectively.Further, all also comprise in the first cell load state broadcast and the second cell load state broadcast: life span indication (Time to Live is called for short TTL).Whenever this message through once transmitting, the value of the TTL in this message subtracts 1, when the TTL in this message is 0, abandons this message.

On the basis of the technique scheme of the embodiment of the invention one, further, after step 204, also comprise: when network manager does not satisfy said load transfer strategy at said candidate cell, return 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 load capacity to be transferred of selection 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 invention two.As shown in Figure 3, this 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, candidate cell is that the current load value sum of load capacity to be transferred and neighbor cell of Serving cell is 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 acquisition by the eNB of Serving cell according to the current load value of Serving cell and the load-threshold value 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: network manager is judged according to 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 preset load transfer strategy, whole eNB report; When candidate cell satisfies the load transfer strategy; Confirm that candidate cell is a Target cell, returns positive acknowledgement message to the eNB of Serving cell.

Wherein, Can not overload after the load that the load transfer strategy can require to shift at the eNB that has shifted whole sub-districts for: this candidate cell; Perhaps, can also after the load that the eNB of the eNB that has shifted Serving cell and other a part of sub-district requires to shift, can not overload for: this candidate cell.

In this step, network manager returns 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 of Target cell transfer service sub-district.

In the embodiment of the invention two, when network manager satisfies said load transfer strategy at said candidate cell, confirm that this candidate cell is a Target cell, thereby the eNB of Serving cell carries out load transfer.Confirm after having shifted the load that all eNB require to shift or shifted the candidate cell that also can not overload after the load that the eNB of eNB and other sub-district of Serving cell requires to shift through network manager as Target cell; Thereby avoided after the Serving cell transferring load; Other sub-district is also to same sub-district transferring load; The ping-pong that causes this sub-district overload and cause, thus the consumption of ping-pong avoided to Internet resources, practiced thrift Internet resources.

On the basis of the technique scheme of the embodiment of the invention two; Further, after step 301, when network manager does not satisfy said load transfer strategy at said candidate cell; ENB to Serving cell returns negative acknowledgment message; So that the eNB of Serving cell is from unselected neighbor cell, the current load value sum of load capacity to be transferred and neighbor cell of selecting Serving cell is 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 invention three.Fig. 5 is the cell load sketch map of the embodiment of the invention three.In the present embodiment; The cell load state broadcast that neighbor cell is sent to Serving cell is called the first cell load state broadcast; The cell load state broadcast that Serving cell is sent to neighbor cell is called the second cell load state broadcast, and the first cell load state broadcast and the second cell load state broadcast are referred to as the load condition broadcast.Referring to Fig. 4 and Fig. 5, this MLB method comprises following process.

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

In this step, particularly, the corresponding sub-district of each eNB comprises the current load value of this sub-district and the load-threshold value of this sub-district in the cell load state broadcast that this eNB sends.ENB can be according to detecting the current load value that obtains this sub-district, according to the preset load-threshold value that obtains this sub-district.ENB can periodically send this cell load state broadcast.For example, eNB sends cell load state broadcast one time per 5 seconds, detects the current load value of this sub-district that obtains comprising current time.Perhaps, eNB can also send this cell load state broadcast according to Event triggered.For example, increase the incident that the expression cell load changes, when the load of eNB corresponding district changes, send cell load state broadcast by this Event triggered eNB.Perhaps, eNB can also periodically send on the basis of this cell load state broadcast, sends this cell load state broadcast according to Event triggered further.For example, increase the incident that the expression cell load changes, when the load of eNB corresponding district changes, send cell load state broadcast by this Event triggered eNB.Be that to send a cell load state broadcast per 5 seconds be example with the concrete mode of periodically sending still, eNB has sent one time cell load state broadcast at the 5th second, subsequently; At the 7th second; The load that eNB detects the sub-district changes, and then 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 once more according to the transmission cycle.

Fig. 6 is the cell load state broadcast structural representation of the embodiment of the invention three.As shown in Figure 6, comprise following field in this cell load state broadcast at least: cell-of-origin identification field, DAF destination address field, load information field.Wherein, the sign of the sub-district of this message is sent in identification field indication in cell-of-origin; This message of DAF destination address field indication is broadcast; The load condition of the sub-district of this message is sent in the indication of load information field, comprises the current load value of this sub-district and the load-threshold value of this sub-district.In cell load state broadcast, comprise on the basis of cell-of-origin identification field, DAF destination address field and load information field, further, can also comprise TTL in the cell load state broadcast.Whenever this message through once transmitting, the value of the TTL in this message just subtracts 1, when the TTL=0 in the 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 sub-district all sends cell load state broadcast to the eNB of separately neighbor cell.In step 402, the cell load state broadcast that the eNB of the eNB reception of neighboring cell of Serving cell sends, the i.e. first cell load state broadcast.Wherein, the cell load state broadcast of each eNB transmission comprises the load-threshold value of current load value He this eNB corresponding district of this eNB corresponding district.In embodiments of the present invention, in Fig. 5, be example as Serving cell with sub-district 1.

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

In this step, the eNB of Serving cell is according to detecting the current load value that can obtain Serving cell, according to the preset load-threshold value that can obtain Serving cell.During more than or equal to load-threshold value, this Serving cell transships, and need carry out MLB in current load value, and then eNB deducts load-threshold value according to the current load value and the load-threshold value of Serving cell with current load value, obtains load capacity to be transferred.During less than load-threshold value, this Serving cell does not transship, and need not carry out MLB in current load value, and then the eNB process ends needn't be carried out subsequent step.In the embodiment shown in fig. 5, with Δ ₁The load capacity to be transferred of expression sub-district 1.

After step 403; The load capacity to be transferred of the eNB selection 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, this process specifically comprise the steps 404 with step 405.

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

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

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

If above-mentioned addition result is less than the load-threshold value of this neighbor cell, execution in step 406, with 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 in step 411.

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

If, returning step 404, the eNB of Serving cell selects a neighbor cell from unselected neighbor cell, and execution in step 405 then.

If not, execution in step 412.

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

Through above-mentioned steps 404, step 405 and step 411; Addition result in step 405 is during less than the load-threshold value of this neighbor cell; The eNB of Serving cell chooses a candidate cell from neighbor cell, the current load value of this candidate cell and the load capacity to be transferred of Serving cell and less than the load-threshold value of this candidate cell.Perhaps; Through above-mentioned steps 404, step 405, step 411 and step 412; Whole neighbor cells of Serving cell all can not be as candidate cell; Be each neighbor cell current load value and Serving cell load capacity to be transferred with all more than or equal to the load-threshold value of this neighbor cell, this MLB process of the eNB of Serving cell end then.After step 412, the eNB of Serving cell can be after waiting for Preset Time, or random wait initiates the MLB process after a period of time once more, promptly carries out again from step 402 beginning.

In the embodiment shown in fig. 5, select neighbor cell to sue for peace at random and be judged as example, comprise sub-district 9 in the neighbor cell of sub-district 1, with L with sub-district 1 ₉The current load value of expression sub-district 9, the eNB of sub-district 1 calculates Δ ₁+ L ₉With, and judge Δ ₁+ L ₉Addition result whether less than the load-threshold value of sub-district 9.In the embodiment shown in fig. 5, with Δ ₁+ L ₉Load-threshold value less than sub-district 9 is an example, then sub-district 1 with sub-district 9 as candidate cell.If Δ ₁+ L ₉More than or equal to the load-threshold value of sub-district 9, then process that other neighbor cell is carried out above-mentioned summation and judgement is continued in sub-district 1, and for example, other neighbor cell can adopt sub-district 5 or sub-district 6 etc.

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

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

After step 406; Network manager is judged according to 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 preset load transfer strategy, whole eNB report; Particularly, get into following steps 407.

Step 407: network manager calculates the to be transferred load capacity sum corresponding with candidate cell that whole eNB report; With the current load value addition of load capacity sum to be transferred with candidate cell; 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 in step 408 confirms that the candidate cell that the eNB of Serving cell reports is a Target cell, returns 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 the load transfer strategy is: can not overload after the load that this candidate cell requires to shift at the eNB that has shifted whole sub-districts, then can adopt mode one: the direct execution in step 409 of network manager, return negative acknowledgment message to the eNB of Serving cell.

If the load transfer strategy is: this candidate cell can not overload after the load that the eNB of the eNB that has shifted Serving cell and other a part of sub-district requires to shift; Then can adopt mode two: network manager is further judged according to the load capacity to be transferred corresponding with above-mentioned candidate cell that whole eNB report.Particularly; During 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 formed reference set with the whole eNB that report the load capacity to be transferred corresponding with candidate cell in the load estimated value of candidate cell.Second step: network manager deducts the load capacity to be transferred of the maximum that the eNB in the reference set reports from the load estimated value of candidate cell; Load estimated value after obtaining to upgrade; 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 carried out for the 3rd step less than the load-threshold value of candidate cell.If more than or equal to the load-threshold value of candidate cell, returning, the load estimated value after the renewal of candidate cell carried out for second step.Network manager carried out for second step once more; From the load estimated value of current candidate cell, deduct the load capacity to be transferred of the maximum that the eNB in the current reference set reports; Load estimated value after obtaining to upgrade once more; From current reference set, deduct the eNB of the load capacity to be transferred that wherein reports this maximum, the load estimated value after upgrading once more 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 execution in step 409 is returned negative acknowledgment message to the eNB of Serving cell.Otherwise execution in step 408 confirms that the candidate cell that the eNB of Serving cell reports is a Target cell, returns positive acknowledgement message to the eNB of Serving cell.

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

Particularly; In step 407,, carry out the process of above-mentioned steps 401 to step 406 because the method for the embodiment of the invention is all adopted in other each sub-district in this network; Then in step 407; Network manager can receive the reporting of eNB of all sub-districts that need carry out MLB, comprises the load capacity to be transferred of the sub-district of this eNB in the reporting of each eNB, and also comprises the cell ID of the candidate cell that MLB process that this eNB initiates is corresponding and the current load value of candidate cell.Thereby network manager obtains the to be transferred load capacity sum corresponding with candidate cell that whole eNB report with the load capacity addition to be transferred to same candidate cell that all eNB send.And network manager is through be provided with the load-threshold value that obtains each sub-district in advance.In the embodiment shown in fig. 5, network manager reports according to the eNB's of sub-district 1, obtains cell ID, the current load value of sub-district 9 and the load capacity Δ to be transferred of sub-district 1 of sub-district 9 ₁And; The method of the embodiment of the invention is all adopted in each sub-district of in this network other, carries out the process of above-mentioned steps 401 to step 406, then in step 407; Network manager can receive the reporting of eNB of all sub-districts that need carry out MLB; Network manager is according to whole reporting of eNB, is the load capacity addition to be transferred of sub-district 9 with candidate cell wherein, and obtaining candidate cell is the load capacity sum to be transferred of sub-district 9; And; Network manager obtains the current load value of sub-district 9 from the reporting of eNB, according to the load-threshold value that obtains sub-district 9 is set, be that the load-threshold value of current load value sum and the sub-district 9 of presetting of load capacity sum to be transferred and the sub-district 9 of sub-district 9 compares to candidate cell.

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

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

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

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

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

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

In the embodiment of the invention three; Through current load value and the load-threshold value of knowing neighbor cell; The eNB of Serving cell is carrying out from neighbor cell, tentatively selecting earlier before the load transfer neighbor cell that can not overload after the load of transfer service sub-district as candidate cell; Confirm after having shifted the load that all eNB require to shift through network manager then or shifted the candidate cell that also can not overload after the load that the eNB of eNB and other sub-district of Serving cell requires to shift as Target cell; Thereby avoided after the Serving cell transferring load, other sub-district is also to same sub-district transferring load, causes this sub-district overload and the ping-pong that causes; Thereby avoided the consumption of ping-pong, practiced thrift Internet resources Internet resources.

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

Wherein, first receiving element 71 is used to receive the first cell load state broadcast from the eNB of neighbor cell.Comprise in the first cell load state broadcast: the current load value of neighbor cell and the load-threshold value of neighbor cell.

Computing unit 72 is used for according to the current load value of Serving cell and the load-threshold value of Serving cell, the load capacity to be transferred of calculation services sub-district.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, do not limit at this.For example, the current load value of Serving cell can obtain according to detecting, and specifically detection module can be set in eNB, adopts the detection module among the eNB to detect acquisition.The load-threshold value of Serving cell can be through being provided with acquisition to this eNB in advance.

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

Report unit 74 to be used for reporting the cell ID of candidate cell, the current load value of candidate cell and the load capacity to be transferred of Serving cell to network manager; So that network manager is judged according to 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 preset load transfer strategy, whole eNB report; When candidate cell satisfies the load transfer strategy; Confirm that candidate cell is a Target cell, returns positive acknowledgement message to eNB.

Second receiving element 75 is used to receive this positive acknowledgement message, triggers the load transfer unit according to positive acknowledgement message.

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

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

On the basis of the technique scheme of the embodiment of the invention four, further, second receiving element 75 also is used for the negative acknowledgment message that the receiving network managing device returns, according to negative acknowledgment message triggering selection unit 73.This negative acknowledgment message is returned to the eNB of Serving cell when candidate cell does not satisfy the load transfer strategy by network manager.Correspondingly; Selected cell 73 also is used for the triggering according to second receiving element 75; From unselected neighbor cell, the load capacity to be transferred of selection 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 returns to the eNB of Serving cell by network manager during more than or equal to the load-threshold value of candidate cell in the current load value sum of load capacity to be transferred sum and candidate cell.

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

On the basis of the technique scheme of the embodiment of the invention four, further, also comprise in the first cell load state broadcast: life span indication TTL; Whenever the first cell load state broadcast through once transmitting, the value of TTL subtracts 1, when the TTL in the first cell load state broadcast is 0, abandons the first cell load state broadcast.Also comprise in the second cell load state broadcast: life span indication TTL; Whenever the second cell load state broadcast through once transmitting, the value of TTL subtracts 1, when the TTL in the second cell load state broadcast is 0, abandons the second cell load state broadcast.

In the embodiment of the 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; The current load value sum of load capacity to be transferred and neighbor cell that selected cell is selected Serving cell less than the neighbor cell of the load-threshold value of this neighbor cell as candidate cell and report network manager; So that network manager is judged according to 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 preset load transfer strategy, whole eNB report; When candidate cell satisfies the load transfer strategy, confirm that this candidate cell is a Target cell, the load transfer unit carries out load transfer to Target cell.Know the current load value and the load-threshold value of neighbor cell through first receiving element; The load transfer unit is before carrying out load transfer; Selected cell is tentatively selected earlier the neighbor cell that can not overload after the load of transfer service sub-district as candidate cell from neighbor cell; Confirm after having shifted the load that all eNB require to shift through network manager then or shifted the candidate cell that also can not overload after the load that the eNB of eNB and other sub-district of Serving cell requires to shift as Target cell; Thereby avoided after the Serving cell transferring load, other sub-district is also to same sub-district transferring load, causes this sub-district overload and the ping-pong that causes; Thereby avoided the consumption of ping-pong, practiced thrift Internet resources Internet resources.

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

Wherein, receiving element 81 is used to receive 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 Serving cell reports.Wherein, Candidate cell is that the current load value sum of load capacity to be transferred and neighbor cell of Serving cell is less than the neighbor cell of the load-threshold value of this neighbor cell; The load capacity to be transferred of Serving cell is calculated acquisition by the eNB of Serving cell according to the current load value of Serving cell and the load-threshold value 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 is used for judging according to 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 preset load transfer strategy, whole eNB report; When candidate cell satisfies the load transfer strategy; Confirm that candidate cell is a Target cell; ENB to Serving cell returns positive acknowledgement message, so that the eNB of Serving cell is to the load capacity to be transferred of the eNB of Target cell transfer service sub-district.。

On the basis of the technique scheme of the embodiment of the invention five; Further; Control unit 82 also is used for when candidate cell does not satisfy the load transfer strategy, returning negative acknowledgment message to the eNB of Serving cell, so that the eNB of Serving cell is from unselected neighbor cell; The load capacity to be transferred of selection 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.

Control unit 82 specifically is used to calculate the to be transferred load capacity sum corresponding with candidate cell that whole eNB report; With the current load value addition of load capacity sum to be transferred with candidate cell; Obtain the load estimated value of candidate cell; And the load-threshold value of load estimated value and candidate cell compared, if the load estimated value of candidate cell, judges that candidate cell satisfies the load transfer strategy less than the load-threshold value of candidate cell; If the load estimated value of candidate cell, judges that candidate cell does not satisfy the load transfer strategy more than or equal to the load-threshold value of candidate cell;

Or; Control unit 82 specifically is used to calculate the to be transferred load capacity sum corresponding with candidate cell that whole eNB report, and with the current load value addition of load capacity sum to be transferred with candidate cell, obtains the load estimated value of candidate cell; And the load-threshold value of load estimated value and candidate cell compared; If the load estimated value of candidate cell, judges that candidate cell satisfies the load transfer strategy less than the load-threshold value of candidate cell, if the load estimated value of candidate cell is more than or equal to the load-threshold value of candidate cell; Network manager is formed reference set with the whole eNB that report the load capacity to be transferred corresponding with candidate cell; From the load estimated value of candidate cell, deduct the load capacity to be transferred of the maximum that the eNB in the reference set reports, the load estimated value after obtaining to upgrade deducts the eNB of the load capacity to be transferred that reports this maximum from reference set; The load estimated value after upgrading and the load-threshold value of candidate cell are compared; If less than the load-threshold value of candidate cell, judging, the load estimated value after the renewal of candidate cell reports 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 satisfy the load transfer strategy; Otherwise, judge that candidate cell satisfies the load transfer 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; From the load estimated value of candidate cell, deduct the load capacity to be transferred of the maximum that the eNB in the reference set reports once more; Load estimated value after upgrading deducts the eNB of the load capacity to be transferred that reports this maximum from reference set, the load estimated value after upgrading and the load-threshold value of candidate cell are compared.

In the embodiment of the invention five; Control unit calculates the to be transferred load capacity sum corresponding with this candidate cell that whole eNB report; In the current load value sum of load capacity to be transferred sum and this candidate cell during less than the load-threshold value of this candidate cell; Confirm that this candidate cell is a Target cell, thereby make the eNB of Serving cell carry out load transfer to Target cell.Confirm after having shifted the load that all eNB require to shift or shifted the candidate cell that also can not overload after the load that the eNB of eNB and other sub-district of Serving cell requires to shift through control unit as Target cell; Thereby avoided after the Serving cell transferring load; Other sub-district is also to same sub-district transferring load; The ping-pong that causes this sub-district overload and cause, thus the consumption of ping-pong avoided to Internet resources, practiced thrift Internet resources.

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

What should explain at last is: above each embodiment is only in order to explaining technical scheme of the present invention, but not to its restriction; Although the present invention has been carried out detailed explanation with reference to aforementioned each embodiment; Those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, perhaps to wherein part or all technical characteristic are equal to replacement; And these are revised or replacement, do not make the scope of the essence disengaging various embodiments of the present invention technical scheme of relevant art scheme.

Claims

1. the balanced MLB method of moving load is characterized in that, comprising:

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 said Serving cell also comprises after network manager reports the load capacity to be transferred of current load value and Serving cell of cell ID, candidate cell of said candidate cell:

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

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

6. the balanced MLB method of moving load is characterized in that, comprising:

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

8. method according to claim 7; It is characterized in that said network manager is according to preset load transfer strategy, all the load-threshold value of current load value and the said candidate cell of the to be transferred load capacity corresponding with said candidate cell that report of eNB, said candidate cell is judged and comprised:

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

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

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

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

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

14. a network manager is characterized in that, comprising:

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

Said control unit also is used for when said candidate cell does not satisfy said load transfer strategy; ENB to said Serving cell returns negative acknowledgment message; So that the eNB of said Serving cell is from unselected neighbor cell; The load capacity to be transferred of selection 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 manager according to claim 15 is characterized in that,