CN101877888A - Mobile load balancing optimization method and wireless access network node - Google Patents
Mobile load balancing optimization method and wireless access network node Download PDFInfo
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Abstract
The invention discloses a mobile load balancing optimization method and a wireless access network node. The method comprises that: a source node sends service capability support information of a source node cell to destination nodes of different access technology, wherein the source node cell is a neighbor cell of a destination node cell; and the destination nodes receive the service capability support information and execute mobile load balancing operation by combining the information. The service capability support information of the neighbor cell is interacted with the nodes of different access technology so that the load balancing operation between LTE and other networks of UMTS, GSM/EDGE and the like can be well performed to well improve the capacity and stability of the networks, and service exception interruption and the like when certain service is switched to an Inter-RAT neighbor cell which does not support the service can be prevented at the same time.
Description
Technical field
The present invention relates to mobile communication system, more particularly, the present invention relates to mobile load balancing optimization method, be specially adapted to the LTE/LTE-A system.
Background technology
Describing LTE (Long Term Evolution) network among the 36300-880 is made up of E-UTRAN (Evolved UTRAN) and EPC (Evolved Packet Core), E-UTRAN comprises the set of base station eNB (Evolved NodeB), EPC comprises MME, S-GW (Serving Gateway) etc., network architecture flattening.ENB is connected by the S1 interface with MME/S-GW, can connect by X2 interface between the eNB.S1, X2 are logic interfacing.A MME/S-GW can manage one or more eNB, and an eNB also can be controlled by a plurality of MME/S-GW, and an eNB can manage one or more sub-districts.The LTE-A system is by the LTE system evolved, and the network architecture is consistent with LTE, has adopted some to come the enhanced system performance as the new technology of Relay, spectrum aggregating and coordinate multipoint (CoMP, Coordinated Multipoint) in LTE-A.
In order to reduce the cost that network is set up, runed and safeguard, the trend of next generation mobile networks must be self-configuring, self-optimizing, self adaptation, more and more littler manual intervention, therefore self-organizing network notion (SON has been proposed, Self-Organized Network), self-organizing network comprises self-configuring and self-optimizing two aspects.
In the network operation, operator wishes that network has good performance all the time, guarantees that therefore it is one of key that each sub-district has enough capacity.Therefore, to carry out load balancing work in the minizone be very important yet terminal distributes and the terminal access is that this has just caused the inhomogeneities and the randomness of cell business volume at random among the mobile network.And the LTE network will inevitably with other network long-term co-existence such as UMTS, GSM/EDGE, so, how to carry out load balancing work preferably between LTE and other network important too.How to make LTE and UMTS (Universal Mobile Telecommunications System, universal mobile telecommunications system), GSM (Global System For Mobile Communication, global system for mobile communications)/EDGE (Enhanced Data rates for GSM Evolution strengthens data transfer rate GSM evolution) waits the content that the present invention will describe that is more preferably that load balancing work between other network does.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of mobile load balancing optimization method and wireless access network node, to optimize mobile load balancing.
For solving the problems of the technologies described above, the invention provides a kind of mobile load balancing optimization method, this method comprises:
Source node is to the professional ability support information of the destination node transmission source node sub-district of different access technologies, and described source node sub-district is the destination node adjacent cells of cells;
Described destination node receives described professional ability support information and operates in conjunction with described information and executing mobile load balancing.
In addition, the condition that triggers the professional ability support information of described source node transmission source node sub-district is that source node discovery source node sub-district adds new adjacent sub-district and should the neighbour sub-district be the destination node sub-district, or the professional ability support information of source node sub-district changes.
In addition, described source node is before described destination node sends the professional ability support information of described source node sub-district, described destination node sends to described source node and obtains the professional ability support information request message of source node sub-district, and described source node sends the professional ability support information of described source node sub-district to described destination node with the form of response message.
In addition, described business support ability information refers to whether described sub-district supports multimedia broadcast multi-broadcasting business MBMS, High Speed Uplink Packet to insert the information of HSUPA, high speed downlink packet access technology HSDPA or video calling Video Call.
The present invention also provides a kind of wireless access network node, and described node is used for obtaining from the adjacent sub-district node of different access technologies the business support ability information of adjacent sub-district, and carries out load balancing in view of the above.
In addition, described business support ability information is that adjacent sub-district node is unsolicited or send request by present node to adjacent sub-district node, is returned according to request by adjacent sub-district node.
In addition, described wireless access network node comprises detection module, the information sending module that is connected with detection module, information receiving module, load balancing module and the memory module that is connected with other modules,
Described detection module, be used to detect the present node sub-district whether new adjacent sub-district is arranged, whether the business support ability information that also is used to detect the present node sub-district changes, when detecting the business support ability change of new adjacent sub-district or present node sub-district, also be used for the announcement information sending module, the wireless access technology different with the present node sub-district adopted in described adjacent sub-district;
Described information sending module is used to inquire about the business support ability information that the node of memory module under the present node adjacent cells of cells sends the present node sub-district;
Described information receiving module is used to receive business support ability information, and is kept in the memory module;
Described memory module is used to store present node sub-district and adjacent Zone tenability information;
Described load balancing module is used for carrying out load balancing according to the business support ability information of described memory module.
In addition, described wireless access network node comprises receiver module, message constructing module, sending module, load balancing module and memory module, wherein the message constructing module is connected with receiver module, sending module, and memory module is connected with receiver module, load balancing module and message constructing module
Receiver module is used to receive business support ability information request message and notification message constructing module, also is used for receiving the business support ability info response message and also business support ability information wherein is kept at memory module;
The message constructing module is used to construct the business support ability information request message, also is used to inquire about memory module structure business support ability info response message;
Sending module, the node that is used under the present node adjacent cells of cells sends business support ability information request message and business support ability info response message;
Memory module is used to store the business support ability response message of present node sub-district and adjacent sub-district;
Load balancing module is used for carrying out load balancing according to the business support ability information of memory module, and inquiry notification message constructing module during less than information needed.
In addition, described business support ability information refers to whether described sub-district supports multimedia broadcast multi-broadcasting business MBMS, High Speed Uplink Packet to insert the information of HSUPA, high speed downlink packet access technology HSDPA or video calling Video Call.
In addition, described node is base station eNB, radio network controller (RNC) or base station controller BSC, carries out interacting message by core net between the described node.
Compared to prior art, mobile load balancing optimization method of the present invention and wireless access network node, by with the business support ability information of the mutual adjacent sub-district of different access technologies node, can so that the load balancing work between other network such as LTE and UMTS, GSM/EDGE etc. can carry out better, with capacity and the stability of network that improves network better, can prevent from simultaneously not support service exception interruption that this professional Inter-RAT adjacent area takes place etc. because of certain business has switched to.
Description of drawings
Fig. 1 is the schematic flow sheet of mobile load balancing optimization method of the present invention;
Fig. 2 is the MLB information exchanging process of E-UTRAN to UTRAN or GERAN;
Fig. 3 is UTRAN or the GERAN MLB information exchanging process to E-UTRAN;
Fig. 4 is the MLB information request/response process of E-UTRAN to UTRAN or GERAN;
Fig. 5 is UTRAN or the GERAN MLB information request/response process to E-UTRAN.
Embodiment
As shown in Figure 1, mobile load balancing optimization method of the present invention, this method comprises:
Step 101: source node is to the professional ability support information of the destination node transmission source node sub-district of different access technologies, and described source node sub-district is the destination node adjacent cells of cells;
Step 102: described destination node receives described professional ability support information and operates in conjunction with described information and executing mobile load balancing.
The said source node of the present invention is relative with destination node.Described source node or destination node are base station eNB, radio network controller (RNC) or base station controller BSC, carry out interacting message by core net between described source node and the destination node.
The present invention Inter-RAT between different radio access technologies transmits Zone tenability information, one of foundation of select target sub-district when being used for the LTE system carrying out mobile load balancing (MLB, Mobility load balancing) between Inter-RAT.Switch to the stronger Inter-RAT adjacent area of business support ability as preventing the situation that certain business has switched to the Inter-RAT adjacent area of not supporting that this is professional, can paying the utmost attention to, or the like.In a network environment that multiple wireless access technology arranged simultaneously (supposing to comprise LTE, UMTS, GSM/EDGE), then relevant with LTE system load balancing can be that universal land radio access web E-UTRAN from evolution is to land radio access web UTRAN or GSM EDGE Radio Access Network GERAN, also can be to arrive E-UTRAN from UTRAN or GERAN (GSM/EDGE Radio Access Network, GSM EDGE Radio Access Network).Zone tenability information comprises: whether support MBMS, HSUPA, HSDPA, Video Call etc.
The invention provides two kinds of methods and be implemented in transmission MLB information (comprising Zone tenability information) between Inter-RAT.
1, unidirectional direct transmission,
Promptly directly MLB information (business support ability information in other words) is sent to destination node by source node.Source node initiatively sends business support ability information by following two kinds of situations:
(1) down to have the adjacent sub-district of new Inter-RAT to add fashionable in certain sub-district when source node is found it, initiatively the business support ability information of current area passed to destination node under the adjacent sub-district of new Inter-RAT.
(2) because software release upgrade etc. causes when the business support ability of current area changes that source node initiatively passes to destination node under the adjacent sub-districts of all Inter-RAT to the business support ability information of current area.Realize from E-UTRAN to UTRAN or GERAN (as Fig. 2) by message mechanism, transmission from UTRAN or GERAN to the MLB information (comprising Zone tenability information) of E-UTRAN (as Fig. 3).
2, request response mechanism
Be source node when needing the MLB information of the adjacent sub-district of Inter-RAT (such as the business support ability information that when doing load balancing between system, can not find out the Inter-RAT adjacent area) in this locality, send request to destination node, destination node is received to echo after the request and is answered message, carries request needed content (as: the business support ability information of Inter-RAT sub-district) in the response message.Can realize from E-UTRAN to UTRAN or GERAN (as Fig. 4) by message mechanism, request from UTRAN or GERAN to the MLB information (comprising Zone tenability information) of E-UTRAN (as Fig. 5).
In conjunction with Fig. 2 and Fig. 3, first kind of mode is described in detail:
Step 1: source node structure MLB information pass-along message (comprising Zone tenability information).
To find that certain sub-district has new Inter-RAT adjacent area to add fashionable when source node, initiatively the business support ability information of current area passed to destination node under the new Inter-RAT adjacent area.Or when because software release upgrade etc. when causing that the business support ability of current area changes, initiatively the business support ability information of current area is passed to destination node under all Inter-RAT adjacent areas.Realize from E-UTRAN to UTRAN or GERAN (as Fig. 1) by message mechanism, transmission from UTRAN or GERAN to the Zone tenability information of E-UTRAN (as Fig. 2).More specifically:
(1), in this message, fill in following content by the eNB of E-UTRAN for the transmission of the Zone tenability information of E-UTRAN--＞UTRAN:
The cell-of-origin can be for a plurality of, the cell-of-origin here can be under the current eNB and its Inter-RAT adjacent area belong to the sub-district of purpose RNC.
(2), in this message, fill in following content by the eNB of E-UTRAN for the transmission of the Zone tenability information of E-UTRAN--＞GERAN:
The cell-of-origin can be for a plurality of, the cell-of-origin here can be under the current eNB and its Inter-RAT adjacent area belong to the sub-district of purpose GERAN sub-district.
(3), in this message, fill in following content by the RNC of UTRAN for the transmission of the Zone tenability information of UTRAN--＞E-UTRAN:
The cell-of-origin can be for a plurality of, the cell-of-origin here can be under the current RNC and its Inter-RAT adjacent area belong to the sub-district of purpose eNB.
(4), in this message, fill in following content by the BSC of GERAN for the transmission of the Zone tenability information of GERAN--＞E-UTRAN:
The cell-of-origin can be for a plurality of, the cell-of-origin here can be under the current BSC and its Inter-RAT adjacent area belong to the sub-district of purpose eNB.
Step 2: source node sends to CN (Core Network, core net) with MLB information pass-along message;
Step 3:CN is forwarded to the CN at destination node place with MLB information pass-along message, may be same CN;
Step 4: the CN at destination node place sends to destination node with MLB information pass-along message.
In conjunction with Fig. 4 and Fig. 5, the second way is described in detail as follows:
Step 1: source node structure MLB information request message (comprise the SON type of message, as: the MLB information request).
Source node (can not find out the business support ability information of the adjacent sub-district of Inter-RAT during load balancing) in this locality between such as the system of doing when needing the business support ability information of Inter-RAT adjacent area, destination node under the adjacent sub-district of Inter-RAT is initiated request, after destination node under the adjacent sub-district of Inter-RAT is received request, carry request needed content (as: Zone tenability information) in the response of answer.Can realize from E-UTRAN to UTRAN or GERAN (as Fig. 3) by message mechanism, request from UTRAN or GERAN to the Zone tenability information of E-UTRAN (as Fig. 4).More specifically:
(1), in this message, fill in following content by the eNB of E-UTRAN for the request of E-UTRAN--＞UTRAN:
Node among the present invention is preserved corresponding adjacent Zone tenability information at each sub-district under it, perhaps unified its all adjacent cells of cells business support ability information down of preserving.
The Inter-RAT adjacent area can be for a plurality of, and the Inter-RAT adjacent area here can be the UTRAN adjacent area of current eNB, and this adjacent area belongs to purpose RNC.
(2), in this message, fill in following content by the eNB of E-UTRAN for the request of E-UTRAN--＞GERAN:
The Inter-RAT adjacent area can be for a plurality of, and the Inter-RAT adjacent area here can be the GERAN adjacent area of current eNB, and this adjacent area belongs to purpose GERAN sub-district.
(3), in this message, fill in following content by the RNC of UTRAN for the request of UTRAN--＞E-UTRAN:
The Inter-RAT adjacent area can be for a plurality of, and the Inter-RAT adjacent area here can be the E-UTRAN adjacent area of current RNC, and this adjacent area belongs to purpose eNB.
(4), in this message, fill in following content by the BSC of GERAN for the request of GERAN--＞E-UTRAN:
The Inter-RAT adjacent area can be for a plurality of, and the Inter-RAT adjacent area here can be the E-UTRAN adjacent area of current GERAN sub-district, and this adjacent area belongs to purpose eNB.
Step 2: source node sends to CN with the MLB information request message;
Step 3:CN is forwarded to the CN at destination node place with the MLB information request message, may be same CN;
Step 4: the CN at destination node place sends to destination node with the MLB information request message;
Step 5: destination node structure MLB info response message (comprise the needed content of request, as: Zone tenability information).More specifically:
(1), in this message, fill in following content by the RNC (Radio Network Controller, radio network controller) of UTRAN for the response of UTRAN--＞E-UTRAN:
The Inter-RAT adjacent area can be for a plurality of, and the Inter-RAT adjacent area here can be the UTRAN adjacent area of source eNB, and this adjacent area belongs to purpose RNC.
(2), in this message, fill in following content by the BSC (Base Station Controler, base station controller) of GERAN for the response of GERAN--＞E-UTRAN:
The Inter-RAT adjacent area can be for a plurality of, and the Inter-RAT adjacent area here can be the GERAN adjacent area of source eNB, and this adjacent area belongs to purpose GERAN sub-district.
(3), in this message, fill in following content by the eNB of E-UTRAN for the response of E-UTRAN--＞UTRAN:
The Inter-RAT adjacent area can be for a plurality of, and the Inter-RAT adjacent area here can be the E-UTRAN adjacent area of source RNC, and this adjacent area belongs to purpose eNB.
(4), in this message, fill in following content by the eNB of E-UTRAN for the response of E-UTRAN--＞GERAN:
The Inter-RAT adjacent area can be for a plurality of, and the Inter-RAT adjacent area here can be the E-UTRAN adjacent area of GERAN sub-district, source, and this adjacent area belongs to purpose eNB;
Step 6: destination node sends to CN with the MLB info response message;
Step 7: the CN at destination node place is forwarded to the CN at source node place with the MLB info response message, may be same CN;
Step 8: the CN at source node place sends to source node with the MLB info response message.
For realizing above method, the present invention also provides a kind of wireless access network node, and described node is used for obtaining from the adjacent sub-district node of different access technologies the business support ability information of abutting subdistrict, and carries out the mobile load balancing operation in view of the above.
As indicated above, described node is base station eNB, radio network controller (RNC) or base station controller BSC, described Zone tenability information refers to whether described sub-district supports MBMS (Multimedia Broadcast Multicast Service, multimedia broadcast multi-broadcasting business), HSUPA (high speed uplink packet access, the High Speed Uplink Packet access), the information of HSDPA (High Speed Downlink Packet Access, high speed downlink packet access technology), Video Call (video calling).
The obtain manner of described business support ability information has following two kinds:
One, adjacent sub-district node initiatively provides;
Two, present node sends request to adjacent sub-district node, and adjacent sub-district node returns according to request.
In order to realize first kind of obtain manner, described wireless access network node comprises detection module, the information sending module that is connected with detection module, information receiving module, load balancing module and the memory module that is connected with other modules, wherein,
Detection module, whether be used to detect the present node sub-district has new adjacent sub-district and should adopt different wireless access technologys in the neighbour sub-district, whether the business support ability information that also is used to detect the present node sub-district changes, when detecting the business support ability change of new adjacent sub-district or present node sub-district, also be used for the announcement information sending module;
Information sending module, the business support ability information that is used to inquire about memory module and the transmission of the node under present node adjacent cells of cells present node sub-district;
Information receiving module is used to receive business support ability information, and is kept in the memory module;
Memory module is used to store present node sub-district and adjacent Zone tenability information;
Load balancing module is used for carrying out load balancing according to the business support ability information of memory module.
In order to realize second kind of obtain manner, described wireless access network node comprises receiver module, message constructing module, sending module, load balancing module and memory module, wherein the message constructing module is connected with receiver module, sending module, memory module is connected with receiver module, load balancing module and message constructing module
Receiver module is used to receive business support ability information request message and notification message constructing module, also is used for receiving the business support ability info response message and also business support ability information wherein is kept at memory module;
The message constructing module is used to construct the business support ability information request message, also is used to inquire about memory module structure business support ability info response message;
Sending module, the node that is used under the present node adjacent cells of cells sends business support ability information request message and business support ability info response message;
Memory module is used to store the business support ability response message of present node sub-district and adjacent sub-district;
Load balancing module is used for carrying out load balancing according to the business support ability information of memory module, and inquiry notification message constructing module during less than information needed.
Mobile load balancing optimization method of the present invention and wireless access network node, by with the business support ability information of the mutual adjacent sub-district of different access technologies node, can so that the load balancing work between other network such as LTE and UMTS, GSM/EDGE etc. can carry out better, with capacity and the stability of network that improves network better, can prevent from simultaneously not support service exception interruption that this professional Inter-RAT adjacent area takes place etc. because of certain business has switched to.
Need at last to illustrate that above execution mode only is used to illustrate the present invention, but not be used to limit the present invention.If do not break away from the spirit and scope of the present invention the present invention is made amendment or is equal to replacement, all should be encompassed in the middle of the claim scope of the present invention.
Claims (10)
1. a mobile load balancing optimization method is characterized in that, this method comprises:
Source node is to the professional ability support information of the destination node transmission source node sub-district of different access technologies, and described source node sub-district is the destination node adjacent cells of cells;
Described destination node receives described professional ability support information and operates in conjunction with described information and executing mobile load balancing.
2. the method for claim 1, it is characterized in that: the condition that triggers the professional ability support information of described source node transmission source node sub-district is, source node is found that the source node sub-district adds new adjacent sub-district and should the neighbour sub-district was the destination node sub-district, or the professional ability support information of source node sub-district changes.
3. the method for claim 1, it is characterized in that: described source node is before described destination node sends the professional ability support information of described source node sub-district, described destination node sends to described source node and obtains the professional ability support information request message of source node sub-district, and described source node sends the professional ability support information of described source node sub-district to described destination node with the form of response message.
4. the method for claim 1 is characterized in that: described business support ability information refers to whether described sub-district supports multimedia broadcast multi-broadcasting business MBMS, High Speed Uplink Packet to insert the information of HSUPA, high speed downlink packet access technology HSDPA or video calling Video Call.
5. wireless access network node, it is characterized in that: described node is used for obtaining from the adjacent sub-district node of different access technologies the business support ability information of adjacent sub-district, and carries out load balancing in view of the above.
6. as node as described in the claim 5, it is characterized in that: described business support ability information is that adjacent sub-district node is unsolicited or send request by present node to adjacent sub-district node, is returned according to request by adjacent sub-district node.
7. as described in the claim 5, it is characterized in that: described wireless access network node comprises detection module, the information sending module that is connected with detection module, information receiving module, load balancing module and the memory module that is connected with other modules,
Described detection module, be used to detect the present node sub-district whether new adjacent sub-district is arranged, whether the business support ability information that also is used to detect the present node sub-district changes, when detecting the business support ability change of new adjacent sub-district or present node sub-district, also be used for the announcement information sending module, the wireless access technology different with the present node sub-district adopted in described adjacent sub-district;
Described information sending module is used to inquire about the business support ability information that the node of memory module under the present node adjacent cells of cells sends the present node sub-district;
Described information receiving module is used to receive business support ability information, and is kept in the memory module;
Described memory module is used to store present node sub-district and adjacent Zone tenability information;
Described load balancing module is used for carrying out load balancing according to the business support ability information of described memory module.
8. node as claimed in claim 5, it is characterized in that: described wireless access network node comprises receiver module, message constructing module, sending module, load balancing module and memory module, wherein the message constructing module is connected with receiver module, sending module, memory module is connected with receiver module, load balancing module and message constructing module
Receiver module is used to receive business support ability information request message and notification message constructing module, also is used for receiving the business support ability info response message and also business support ability information wherein is kept at memory module;
The message constructing module is used to construct the business support ability information request message, also is used to inquire about memory module structure business support ability info response message;
Sending module, the node that is used under the present node adjacent cells of cells sends business support ability information request message and business support ability info response message;
Memory module is used to store the business support ability response message of present node sub-district and adjacent sub-district;
Load balancing module is used for carrying out load balancing according to the business support ability information of memory module, and inquiry notification message constructing module during less than information needed.
9. node as claimed in claim 5 is characterized in that: described business support ability information refers to whether described sub-district supports multimedia broadcast multi-broadcasting business MBMS, High Speed Uplink Packet to insert the information of HSUPA, high speed downlink packet access technology HSDPA or video calling Video Call.
10. node as claimed in claim 5 is characterized in that: described node is base station eNB, radio network controller (RNC) or base station controller BSC, carries out interacting message by core net between the described node.
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| CN2009101379550A CN101877888A (en) | 2009-04-28 | 2009-04-28 | Mobile load balancing optimization method and wireless access network node |
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| CN2009101379550A CN101877888A (en) | 2009-04-28 | 2009-04-28 | Mobile load balancing optimization method and wireless access network node |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102625370A (en) * | 2012-04-20 | 2012-08-01 | 重庆邮电大学 | Heterogeneous network vertical handover method based on network joint effect optimization and load balancing |
| CN102665254A (en) * | 2012-05-21 | 2012-09-12 | 哈尔滨工业大学 | Selection method of access of CDMA (Code Division Multiple Access)/WLAN (Wireless Local Area Network) heterogeneous network based on user gain |
| CN104519506A (en) * | 2013-09-27 | 2015-04-15 | 北京三星通信技术研究有限公司 | Method and device for self-optimization |
| US20230076044A1 (en) * | 2012-07-31 | 2023-03-09 | Dali Wireless, Inc. | Optimization of traffic load in a distributed antenna system |
-
2009
- 2009-04-28 CN CN2009101379550A patent/CN101877888A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102625370A (en) * | 2012-04-20 | 2012-08-01 | 重庆邮电大学 | Heterogeneous network vertical handover method based on network joint effect optimization and load balancing |
| CN102625370B (en) * | 2012-04-20 | 2015-07-15 | 重庆邮电大学 | Heterogeneous network vertical handover method based on network joint effect optimization and load balancing |
| CN102665254A (en) * | 2012-05-21 | 2012-09-12 | 哈尔滨工业大学 | Selection method of access of CDMA (Code Division Multiple Access)/WLAN (Wireless Local Area Network) heterogeneous network based on user gain |
| CN102665254B (en) * | 2012-05-21 | 2015-03-11 | 哈尔滨工业大学 | Selection method of access of CDMA (Code Division Multiple Access)/WLAN (Wireless Local Area Network) heterogeneous network based on user gain |
| US20230076044A1 (en) * | 2012-07-31 | 2023-03-09 | Dali Wireless, Inc. | Optimization of traffic load in a distributed antenna system |
| CN104519506A (en) * | 2013-09-27 | 2015-04-15 | 北京三星通信技术研究有限公司 | Method and device for self-optimization |
| CN104519506B (en) * | 2013-09-27 | 2020-02-07 | 北京三星通信技术研究有限公司 | Self-optimization method and device |
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