CN101841850A - Method, device and system for acquiring neighboring cell load information from LTE system - Google Patents
Method, device and system for acquiring neighboring cell load information from LTE system Download PDFInfo
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Abstract
The invention discloses a method for acquiring neighboring cell load information from an LTE system. The method comprises the following steps that: a first base station sends a load request message which carries a base station identifier of a second base station to a mobile management entity (MME) through an S1 interface; the MME resolves the load request message and sends a load request retransmission message which carries the base station identifier of the first base station to the second base station through the S1 interface; the second base station acquires the load information of a cell which is controlled by the second base station and sends a load response message which carries the base station identifier of the first base station and the load message to the MME through the S1 interface; and the MME sends the load response retransmission message which carries the base station identifier of the second base station and the load message to the first base station through the S1 interface. The invention also discloses a system and the mobile management entity which can apply the method. The invention provides the scheme of realizing acquisition of the neighboring cell load message by using the S1 interface, so the reliability of the system is improved.
Description
Technical field
The present invention relates to the mobile communication technology field, particularly (Long Term Evolution LTE) obtains the methods, devices and systems of neighboring cell load information in the system in the Long Term Evolution project.
Background technology
(Evolved-Universal Mobile Telecommunication System Terrestrial Radio Access Network, E-UTRAN) annexation of middle network element as shown in Figure 1 for the universal mobile telecommunications system grounding wireless access network of the evolution in the LTE system.E-UTRAN comprises several base stations (eNB) 102, and the agreement of user's face (packet data control agreement/Radio Link control/media access control layer/physical layer) and the chain of command (Radio Resource control (RRC)) of E-UTRA is provided, and ends at subscriber equipment (UE).Can interconnect by X2 interface between the eNB 102.ENB102 is by packet nuclear (Evolved Packet Core, EPC) 101 connections of S1 interface and evolution.Described EPC can be mobile management entity (Mobile Management Entity, MME) or gateway (Service Gateway, S-GW).The S1 interface comprises user plane and control plane two parts, on user plane, is the S1-U interface between eNB and the S-GW, is used for service data transmission, is the S1-MME interface between ENB and the MME on the control plane, is used for command transmitting.ENB102 is connected with MME by S1-MME interface, is connected with S-GW by S1-U interface.The S1 interface is supported multi-multipoint being connected between MME/S-GW and the eNB.
In the LTE system, load comprises three key elements: the load of radio bearers (load on promptly eating dishes without rice or wine), transport network layer and the hardware load of node.Wherein radio bearers has following form according to the definition of agreement:
1, total Physical Resource Block (Physical Resource Block, PRB) utilance;
2, the PRB utilance of particular traffic type;
3, the PRB utilance of descending Common Control Channel;
4, the PRB utilance of up Common Control Channel;
The utilance of the random access guiding that 5, receives.
The purpose of load balancing is that the load with the minizone reasonably distributes, with the high usage that guarantees Radio Resource, the highland keeps QoS (QoS), keeps enough little cutting off rate etc. as far as possible.The load balancing algorithm generally is to be basis for estimation with neighboring cell load information, and switch the sub-district and the parameter of sub-district gravity treatment by adjusting, the relevant load transfer of high load capacity sub-district in the underload sub-district.
In the load balancing process, eNB can utilize the x2 interface to realize the request of neighboring cell load information.But there is not x2 to connect in some cases between the eNB, for example:
1, integration reference point management station (Integration Reference Point ManagerIRPManager) forbids that source eNB sets up x2 to purpose eNB and connects;
2, comprised a large amount of little base station (micro eNB) in the overlay area of a macro base station (macro eNB), micro eNB sets up a large amount of physical resource that the request meeting consumes macro eNB to the X2 between the macro eNB, and therefore IRPMananger does not allow micro eNB and macroeNB to set up the x2 interface in this case.
3. on the border, administrative region, as near the eNB the provincial boundaries, IRPManager does not allow the eNB of boundary and the eNB in other provinces to set up X2 interface.
ENB is not when having the situation of x2 interface, and two eNB still have the needs that carry out load balancing.For example be not allow to set up the x2 interface between micro eNB and macro eNB, if but load need be a part of load transfer among the micro eNB among macro eNB when heavier among the microeNB.
Under the situation that does not have the x2 interface between the eNB, prior art can't realize obtaining neighboring cell load information.
Summary of the invention
In view of this, the embodiment of the invention proposes a kind of methods, devices and systems that obtain neighboring cell load information in the LTE system, can realize obtaining of neighboring cell load information under the situation that does not have the x2 interface between the eNB.
The method of the neighboring cell load information of obtaining in the LTE system that the embodiment of the invention proposes, the sub-district of the sub-district of first base stations control and second base stations control is a neighbor cell, comprises the steps:
First base station sends the load request message by the S1 interface to mobile management entity MME, comprises the Base Station Identification of second base station in the described load request message;
MME resolves described load request message, and sends load request transfer message by the S1 interface to second base station, comprises the Base Station Identification of first base station in the described load request transfer message;
Second base station obtains the information on load of its sub-district of controlling, and sends the load response message by the S1 interface to MME, comprises the Base Station Identification and the described information on load of first base station in the described load response message;
MME sends load by the S1 interface to first base station and replys transfer message, and described load is replied Base Station Identification and the described information on load that comprises second base station in the transfer message.
The embodiment of the invention also proposes a kind of system that obtains neighboring cell load information in the LTE system, comprise first base station, second base station and mobile management entity MME, described first base station, second base station and MME belong to same MME pond, and the sub-district of first base station and second base stations control is a neighbor cell;
Described first base station is used for sending the load request message by the S1 interface to mobile management entity MME, comprises the Base Station Identification of second base station in the described load request message; Also be used for replying transfer message by the reception of S1 interface from the load of MME, described load is replied Base Station Identification and the information on load that comprises second base station in the transfer message;
Described MME is used to resolve the load request message from first base station, and sends load request transfer message by the S1 interface to second base station, comprises the Base Station Identification of first base station in the described load request transfer message; Also be used for by the load response message of S1 interface reception from second base station, and reply transfer message to first base station transmission load, described load is replied Base Station Identification and the information on load that comprises second base station in the transfer message;
Described second base station is used for by the load request transfer message of S1 interface reception from MME, obtain the information on load of its sub-district of controlling, and pass through the S1 interface to MME transmission load response message, comprise the Base Station Identification and the information on load of first base station in the described load response message.
The embodiment of the invention also discloses the another kind of system that in the LTE system, obtains neighboring cell load information, comprise first base station, second base station, the first mobile management entity MME pond and the 2nd MME pond, described first base station belongs to a MME pond, second base station belongs to the 2nd MME pond, and the sub-district of first base station and second base stations control is a neighbor cell;
Described first base station is used for sending the load request message by the S1 interface to the MME in a MME pond, comprises the Base Station Identification of second base station in the described load request message; Also be used for replying transfer message by the reception of S1 interface from the load of the MME in a MME pond, described load is replied Base Station Identification and the information on load that comprises second base station in the transfer message;
MME in the one MME pond is used to resolve the load request message from first base station, judges that second base station does not belong to a MME pond, determines that the MME pond under second base station is the 2nd MME pond, and the arbitrary MME in the 2nd MME pond transmits described load request message; Also be used to receive the load response message from the MME in the 2nd MME pond, and reply transfer message to first base station transmission load, described load is replied Base Station Identification and the information on load that comprises second base station in the transfer message;
MME in the 2nd MME pond is used for receiving the load request message from the MME in a MME pond, sends load request transfer message to second base station, comprises the Base Station Identification of first base station in the described load request transfer message; Also be used for by the load response message of S1 interface reception from second base station, first base station of judging the Base Station Identification correspondence of carrying in the load response message does not belong to the 2nd MME pond, determine that first base station belongs to a MME pond, and the MME in a MME pond sends described load response message;
Described second base station is used for by the load request transfer message of S1 interface reception from the MME in the 2nd MME pond, obtain the information on load of its sub-district of controlling, and, comprise the Base Station Identification and the information on load of first base station in the described load response message by the MME transmission load response message of S1 interface in the 2nd MME pond.
The embodiment of the invention also proposes a kind of MME, and described MME is connected with the base station by the S1 interface, and described MME comprises:
Transceiver module, be used for by the load request message of S1 interface reception from the Base Station Identification that carries second base station of first base station, described load request message is sent to parsing module, and will be sent to second base station by the S1 interface from the load request transfer message of the Base Station Identification that comprises first base station of resolving module;
Parsing module with resolving the load request message of being received, generates the load request transfer message of the Base Station Identification that comprises first base station, and described load request transfer message is sent to transceiver module.
As can be seen from the above technical solutions, utilize MME as message transfer entity, first base station sends the load request message by the S1 interface to MME, go to second base station in the MME request of will loading, second base station response message of will loading again sends to MME by the S1 interface, and MME will load response message by going to first base station in the S1 interface.The present invention has provided and has utilized the S1 interface to realize the scheme that neighboring cell load message is obtained, and with respect to prior art, has avoided because not the existing of X2 interface, and can't obtain the situation of the information on load of adjacent area, has improved system reliability.
Description of drawings
Fig. 1 is the annexation schematic diagram of network element among the E-UTRAN in the LTE system;
Fig. 2 obtains the flow chart of neighboring cell load message for the embodiment of the invention one;
Fig. 3 is the flow chart of a concrete application scenarios of the embodiment of the invention one;
Fig. 4 obtains the flow chart of neighboring cell load message for the embodiment of the invention two;
Fig. 5 is the flow chart of a concrete application scenarios of the embodiment of the invention two.
Embodiment
In the LTE system, the S1 interface between MME/S-GW and the eNB exists always.The basic ideas of obtaining the neighboring cell load information scheme that the present invention proposes are: with the transfer entity that MME transmits as load message, an eNB utilizes the S1 interface to send a load request message to MME; After receiving, MME gives the 2nd eNB with this forwards; The 2nd eNB sends to MME to information on load as response message after receiving this message, and MME sends to an eNB to this message after receiving this response message again.
For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is further elaborated below in conjunction with accompanying drawing.
In the load request message that MME sends, comprise following information at an eNB:
1, the Base Station Identification of the 2nd eNB under the Target cell and the cell ID of Target cell.Base Station Identification is used for unique identification eNB, and cell ID is used to identify the sub-district that the 2nd eNB is controlled.Cell ID also can be default, represents that whole sub-districts of the 2nd eNB control all are Target cells.
2, load type: comprise that (Transport Network Layer, a kind of or combination in any in TNL) load, hardware load and the radio bearers is used to the load type of representing that an eNB need obtain to transport network layer.If load type is default, then the load type of acquiescence is obtained in expression, and described acquiescence load type can be the agreement regulation, or the load type of stipulating in the request message of last time loading.
3, reporting period.The 2nd eNB can periodically report the situation of the cell load in this eNB to an eNB according to reporting period after obtaining request.Reporting period can be default, can represent only to report the cell load situation under the default situation one time, also can represent it is the reporting period of acquiescence.The described Default Reports cycle can be the agreement regulation, or the reporting period of stipulating in the request message of last time loading.
4, sign is measured in request, has distinguished the measurement request in the different moment.
The 2nd eNB has in comprising in the load response message that MME sends:
1, the Base Station Identification of an eNB is used for eNB of unique identification.
2, information on load: be meant the TNL load based on the sub-district, hardware load or the radio bearers information that acquires of measuring, this load type is determined by the load type in the solicited message.The form of information on load can adopt for example enumeration type description of normal condition, abnormal condition etc., also can represent its utilance by a numeral.Information on load is not limited to this two kinds of forms, also can adopt thinkable other form of those skilled in the art.
3, sign is measured in request, has distinguished the measurement request in the different moment.Owing to the response message of loading is replying of load request message, the request measurement that therefore requires to carry in two these two message identifies identical to represent a pair of request and response message.
Whether belong to same MME pond according to an eNB and the 2nd eNB, below respectively both of these case is illustrated by two specific embodiments.
One: the one eNB of embodiment and the 2nd eNB belong to same MME pond.
The flow process of obtaining neighboring cell load message comprises the steps: as shown in Figure 2
Step 201: an eNB sends load request message (eNBResource Status Request) by the S1 interface to MME, and sign etc. is measured in the Base Station Identification, load type, reporting period, the request that have wherein comprised the 2nd eNB.
Step 202:MME resolves this message after receiving the load request message, judge that the 2nd eNB belongs to current MME pond, then send load request transfer message (MMEResource Status Request Transfer) to the 2nd eNB by the S1 interface, the Base Station Identification that has wherein comprised an eNB, sign is measured in load type, reporting period, request.
Step 203: the 2nd eNB receives the load request transfer message that MME sends, according to the load type in the described message, obtain corresponding information on load, and pass through the S1 interface to MME transmission load response message (eNB Resource Status Response), sign is measured in the Base Station Identification, information on load and the request that have comprised an eNB in the message.Described request is measured sign asks the request measurement sign in the transfer message identical with load.
Step 204:MME resolves this message after receiving this message, judge that an eNB belongs to current MME pond, then send load and reply transfer message (MME Resource Status Response Transfer) to an eNB, the sign that has wherein comprised the 2nd eNB, sign is measured in information on load and request.
Below come the scheme of present embodiment is elaborated in conjunction with concrete application scenarios again.If sub-district A1 belongs to eNB A.Sub-district B1 is the adjacent area of sub-district A, and sub-district B1 belongs to eNB B.And eNBA and eNB B belong to same MME pond.The Base Station Identification of eNB A and eNB B is respectively 1000 and 1200.ENB A obtain eNB B sub-district B information on load flow process as shown in Figure 3, comprise the steps:
Step 301:eNB A periodically adds up the load condition of all sub-districts among this eNB, and judges the state of each sub-district.ENB A finds the wireless overload of sub-district A1, then begins to carry out the load balancing process.
Step 302:eNB A sends load request message (eNB Resource Status Request) by the S1 interface, and wherein the Base Station Identification of purpose eNB is 1200, and load type is that no specific electric load, reporting period are 2000ms, and request is measured and is designated 1.
After step 303:MME receives this message, find that target eNB is that eNB B is in current MME pool, and to eNB B transmission load request transfer message (MME Resource Status Request Transfer), wherein comprise: the Base Station Identification of eNB A is 1000, load type is that no specific electric load, reporting period are 2000ms, and request is measured and is designated 1.
After step 304:eNB B receives this message, regulation according to described reporting period, obtain information on load and send load response message (eNB Resource Status Response) every 2000ms to MME, wherein comprise: the Base Station Identification of target eNB is 1000, information on load is up 23 (utilance of expression PRB is 23%), descending 30 (utilance of expression PRB is 30%), request is measured and is designated 1.
After step 305:MME receives this message, find that target eNB is that eNB A belongs to current MME pond, therefore send load to eNB A and reply transfer message (MME Resource Status Response Transfer), wherein the Base Station Identification of source eNB is 1200, information on load is up 23 (utilance of expression PRB is 23%), descending 30 (utilance of expression PRB is 30%), request is measured and is designated 1.
Two: the one eNB of embodiment belong to different MME ponds with the 2nd eNB, and an eNB belongs to a MME pond, and the 2nd eNB belongs to the 2nd MME pond.
The flow process of obtaining neighboring cell load message comprises the steps: as shown in Figure 4
Step 401: an eNB sends load request message (eNB Resource Status Request) by arbitrary MME of S1 interface in a MME pond, and sign etc. is measured in the Base Station Identification, load type, reporting period, the request that have wherein comprised the 2nd eNB.
Step 402: described MME resolves this message after receiving the load request message, judges that the 2nd eNB does not belong to a MME pond, determine that then the MME pond under the 2nd eNB is the 2nd MME pond, and the arbitrary MME in the 2nd MME pond transmits described load request message.
Step 403: the MME that receives the load request message in described the 2nd MME pond sends load request transfer message (MME Resource Status Request Transfer) to the 2nd eNB, the Base Station Identification that has wherein comprised an eNB, sign is measured in load type, reporting period, request.
Step 404: the 2nd eNB receives described load request transfer message, according to the load type in the described message, obtain corresponding information on load, and the arbitrary MME transmission load response message (eNB Resource Status Response) in the 2nd MME pond, sign is measured in the Base Station Identification, information on load and the request that have comprised an eNB in the message.Described request is measured sign asks the request measurement sign in the transfer message identical with load.Arbitrary MME in the 2nd MME pond in this step and the MME in the 2nd MME pond in the step 403 can be same MME, also can be two different MME that belong to the 2nd MME pond.
Step 405: described receive the load response message the 2nd MME pond in MME resolve this message, judge that an eNB does not belong to the 2nd MME pond, determine that then the MME pond that an eNB belongs to is a MME pond, and the arbitrary MME in a MME pond transmits described load response message.
Arbitrary MME in the MME pond in this step and the arbitrary MME in the MME pond in the step 401 can be same MME, also can be two different MME that belong to a MME pond.
Step 406: the MME in the described MME pond of receiving the load response message sends load to an eNB and replys transfer message (MME Resource Status Response Transfer), the sign that has wherein comprised the 2nd eNB, sign is measured in information on load and request.
Below come the scheme of present embodiment is elaborated in conjunction with concrete application scenarios again.If sub-district A1 belongs to eNB A.Sub-district B1 is the adjacent area of sub-district A, and sub-district B1 belongs to eNB B.ENB A belongs to a MME pond, and eNB B belongs to the 2nd MME pond.The Base Station Identification of eNB A and eNB B is respectively 1000 and 1200.ENB A obtain eNB B sub-district B information on load flow process as shown in Figure 5, comprise the steps:
Step 501:eNB A periodically adds up the load condition of all sub-districts among this eNB, and judges the state of each sub-district.ENB A finds the wireless overload of sub-district A1, then begins to carry out the load balancing process.
Step 502:eNB A sends load request message (eNB Resource Status Request) by the MME A1 of S1 interface in a MME pond, wherein the Base Station Identification of purpose eNB is 1200, load type is that no specific electric load, reporting period are 2000ms, and request is measured and is designated 1.
After step 503:MME A1 receives this message, find that target eNB is that eNB B belongs to i.e. the 2nd MME pond, another MME pond, then the MME B1 in the 2nd MME pond transmits described load request message.
Step 504:MME B1 sends load request transfer message (MME Resource Status Request Transfer) to eNB B, wherein comprise: the Base Station Identification of eNB A is 1000, load type is that no specific electric load, reporting period are 2000ms, and request is measured and is designated 1.
After step 505:eNB B receives this message, regulation according to reporting period, obtain information on load every 2000ms, and to MME B1 transmission load response message (eNB Resource Status Response), wherein comprise: the Base Station Identification of target eNB is 1000, information on load is up 23 (utilance of expression PRB is 23%), descending 30 (utilance of expression PRB is 30%), and request is measured and is designated 1.
After step 506:MME B1 receives described load response message, find that target eNB is that eNBA belongs to another MME pond, i.e. a MME pond, the therefore forwarding of the MME A2 in MME pond load response message.Preferably, MME A2 and MME A1 are same MME.
Step 507:MME A2 sends load to eNB A and replys transfer message (MME Resource Status Response Transfer), wherein the Base Station Identification of source eNB is 1200, information on load is up 23 (utilance of expression PRB is 23%), descending 30 (utilance of expression PRB is 30%), request is measured and is designated 1.
The MME that relates in the above scheme has increased as lower module with respect to prior art:
Transceiver module, be used for by the load request message of S1 interface reception from the Base Station Identification that carries second base station of first base station, described load request message is sent to parsing module, and will be sent to second base station by the S1 interface from the load request transfer message of the Base Station Identification that comprises first base station of resolving module;
Parsing module with resolving the load request message of being received, generates the load request transfer message of the Base Station Identification that comprises first base station, and described load request transfer message is sent to transceiver module.
Transceiver module and parsing module are similar to the above to the processing mode of load response message, and just the position of first base station and second base station is changed mutually.
If described MME belongs to a MME pond, and be connected with the MME that belongs to the 2nd MME pond;
The described MME that belongs to a MME pond further comprises:
Judge module is used for judging whether second base station of the Base Station Identification correspondence that load request message that described transceiver module is received carries belongs to a MME pond, if then described load request message is sent to parsing module; Otherwise, determine that second base station belongs to the 2nd MME pond, described load request message is sent to MME in the 2nd MME pond.
The scheme of the embodiment of the invention utilizes MME as message transfer entity, obtain the load message of adjacent area by the S1 interface, with respect to prior art, the present invention has avoided not existing because of X2 interface, and can't obtain the situation of the information on load of adjacent area, improved system reliability.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being done within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a method of obtaining neighboring cell load information in the LTE system is characterized in that, the sub-district of the sub-district of first base stations control and second base stations control is a neighbor cell, comprises the steps:
First base station sends the load request message by the S1 interface to mobile management entity MME, comprises the Base Station Identification of second base station in the described load request message;
MME resolves described load request message, and sends load request transfer message by the S1 interface to second base station, comprises the Base Station Identification of first base station in the described load request transfer message;
Second base station obtains the information on load of its sub-district of controlling, and sends the load response message by the S1 interface to MME, comprises the Base Station Identification and the described information on load of first base station in the described load response message;
MME sends load by the S1 interface to first base station and replys transfer message, and described load is replied Base Station Identification and the described information on load that comprises second base station in the transfer message.
2. method according to claim 1 is characterized in that, further comprises load type in the described load request message, is used for representing a kind of or combination in any of transport network layer load, hardware load and radio bearers;
The step that described second base station obtains the information on load of its sub-district of controlling is: second base station obtains its institute's corresponding information on load in the sub-district of controlling according to the load type in the load request transfer message of being received.
3. method according to claim 1 is characterized in that, further comprises reporting period in the described load request message;
Described second base station obtains the information on load of its sub-district of controlling, and by the S1 interface to the step that MME sends the load response message is:
Second base station obtains the information on load of its sub-district of controlling every described reporting period of official hour, and sends the load response message by the S1 interface to MME.
4. method according to claim 1 is characterized in that, described load request message, load request transfer message, load response message and load are replied transfer message and carried identical request measurement sign.
5. according to each described method of claim 1 to 4, it is characterized in that described MME resolves described load request message, and comprise to the step that second base station sends load request transfer message by the S1 interface:
MME judges whether second base station belongs to a MME pond at described MME place, if then send load request transfer message by the S1 interface to second base station;
Otherwise, determine that the MME pond under second base station is the 2nd MME pond, and the arbitrary MME in the 2nd MME pond transmits described load request message; The MME that receives the load request message in described the 2nd MME pond sends load request transfer message to second base station.
6. method according to claim 5, it is characterized in that, described second base station obtains the information on load of its sub-district of controlling, and sends the load response message by the S1 interface to MME, comprises the Base Station Identification of first base station and the step of described information on load in the described load response message and comprises:
Second base station obtains the information on load of its sub-district of controlling, and sends the load response message by arbitrary MME of S 1 interface in the 2nd MME pond, comprises the Base Station Identification and the described information on load of first base station in the described load response message;
MME in described the 2nd MME pond of receiving the load response message judges that first base station does not belong to the 2nd MME pond, determine that then the MME pond that first base station belongs to is a MME pond, and the arbitrary MME in a MME pond transmits described load response message.
7. system that in the LTE system, obtains neighboring cell load information, it is characterized in that, comprise first base station, second base station and mobile management entity MME, described first base station, second base station and MME belong to same MME pond, and the sub-district of first base station and second base stations control is a neighbor cell;
Described first base station is used for sending the load request message by the S1 interface to mobile management entity MME, comprises the Base Station Identification of second base station in the described load request message; Also be used for replying transfer message by the reception of S1 interface from the load of MME, described load is replied Base Station Identification and the information on load that comprises second base station in the transfer message;
Described MME is used to resolve the load request message from first base station, and sends load request transfer message by the S1 interface to second base station, comprises the Base Station Identification of first base station in the described load request transfer message; Also be used for by the load response message of S1 interface reception from second base station, and reply transfer message to first base station transmission load, described load is replied Base Station Identification and the information on load that comprises second base station in the transfer message;
Described second base station is used for by the load request transfer message of S1 interface reception from MME, obtain the information on load of its sub-district of controlling, and pass through the S1 interface to MME transmission load response message, comprise the Base Station Identification and the information on load of first base station in the described load response message.
8. system that in the LTE system, obtains neighboring cell load information, it is characterized in that, comprise first base station, second base station, the first mobile management entity MME pond and the 2nd MME pond, described first base station belongs to a MME pond, second base station belongs to the 2nd MME pond, and the sub-district of first base station and second base stations control is a neighbor cell;
Described first base station is used for sending the load request message by the S1 interface to the MME in a MME pond, comprises the Base Station Identification of second base station in the described load request message; Also be used for replying transfer message by the reception of S 1 interface from the load of the MME in a MME pond, described load is replied Base Station Identification and the information on load that comprises second base station in the transfer message;
MME in the one MME pond is used to resolve the load request message from first base station, judges that second base station does not belong to a MME pond, determines that the MME pond under second base station is the 2nd MME pond, and the arbitrary MME in the 2nd MME pond transmits described load request message; Also be used to receive the load response message from the MME in the 2nd MME pond, and reply transfer message to first base station transmission load, described load is replied Base Station Identification and the information on load that comprises second base station in the transfer message;
MME in the 2nd MME pond is used for receiving the load request message from the MME in a MME pond, sends load request transfer message to second base station, comprises the Base Station Identification of first base station in the described load request transfer message; Also be used for by the load response message of S1 interface reception from second base station, first base station of judging the Base Station Identification correspondence of carrying in the load response message does not belong to the 2nd MME pond, determine that first base station belongs to a MME pond, and the MME in a MME pond sends described load response message;
Described second base station is used for by the load request transfer message of S1 interface reception from the MME in the 2nd MME pond, obtain the information on load of its sub-district of controlling, and, comprise the Base Station Identification and the information on load of first base station in the described load response message by the MME transmission load response message of S1 interface in the 2nd MME pond.
9. mobile management entity MME, described MME is connected with the base station by the S1 interface, it is characterized in that described MME comprises:
Transceiver module, be used for by the load request message of S1 interface reception from the Base Station Identification that carries second base station of first base station, described load request message is sent to parsing module, and will be sent to second base station by the S1 interface from the load request transfer message of the Base Station Identification that comprises first base station of resolving module;
Parsing module with resolving the load request message of being received, generates the load request transfer message of the Base Station Identification that comprises first base station, and described load request transfer message is sent to transceiver module.
10. MME according to claim 9 is characterized in that, described MME belongs to a MME pond, and is connected with the MME that belongs to the 2nd MME pond;
The described MME that belongs to a MME pond further comprises:
Judge module is used for judging whether second base station of the Base Station Identification correspondence that load request message that described transceiver module is received carries belongs to a MME pond, if then described load request message is sent to parsing module; Otherwise, determine that second base station belongs to the 2nd MME pond, described load request message is sent to MME in the 2nd MME pond.
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| CN101841850B (en) | 2012-12-12 |
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