CN101212772A - Switching method and switching system - Google Patents
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- CN101212772A CN101212772A CNA2006100637763A CN200610063776A CN101212772A CN 101212772 A CN101212772 A CN 101212772A CN A2006100637763 A CNA2006100637763 A CN A2006100637763A CN 200610063776 A CN200610063776 A CN 200610063776A CN 101212772 A CN101212772 A CN 101212772A
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Abstract
The invention provides a switch method which comprises the following steps: after the switch request information of an target areola is received, a source mobile switching center MSC searches for corresponding relationship between neighboring areolas of a source MSC preserved by network side and a MSC in the MSC pool of the neighboring areolas, so as to make sure the target MSC corresponding to the target areola and send equipment indication to the target MSC. The invention also provides a switch system. By adopting the switch method and the switch system, when the target areola belongs to the MSC pool under a frame of A-Flex, the source MSC can choose a target MSC from a plurality of set switch target MSCs, thus ensuring load distribution of interoffice switch.
Description
Technical field
The present invention relates to communication technical field, particularly a kind of changing method and switched system.
Background technology
Referring to traditional mobile communication system structural representation shown in Figure 1, (the MobileSwitch Center of mobile switching centre, be called for short " MSC ") can connect a plurality of base station controllers (Base Station Control is called for short " BSC "), but a BSC can only connect a MSC.Relation between this MSC and the BSC has restricted the flexibility of networking; when a MSC at delay machine or when shutting down upgrade maintenance of serious overload, fault; user in the wireless range that all BSC that hang under this MSC cover can't carry out Circuit Service communication; influence to the user is very big, also is that institute of operator is flagrant.
A-Flex (A interface Flexibility, A interface flexibility) framework, A interface are the interface between wireless access network and the core net in the cdma network, and a BSC links to each other with a plurality of MSC simultaneously.Behind MSC device upgrade maintenance, overload or a paralysed machine, allow other available MSC that it connected serve for the interior user of BSC institute coverage that this MSC hangs down.The mechanism of A-Flex itself makes the load between a plurality of MSC nodes redistribute with load balancing becomes possibility, and itself also can effectively avoid the appearance of individual node overload situations.
The A-Flex networking as shown in Figure 2, wherein the scope of pond (POOL) refers to be made up of the wireless coverage of at least one (being generally a plurality of) BSC, these a plurality of BSC are by all MSC (at least two) common service in the pond.In the A-Flex network, when certain travelling carriage (Mobile Station, be called for short " MS ") when roaming in the pond, all core net processing procedures are carried out on the specific MSC in the pond.And MSC5 has represented MSC and the BSC node of not supporting the A-Flex characteristic outside the pond with its BSC7 that is connected and BSC8 among the figure.
Compare traditional mobile communication system, the networking mode of this mobile communication system based on the MSC pond is more flexible, such as, switching in the pond between BSC1 and BSC2 is that intra-office switches, when the user of BSC1 moves to the BSC2 service area in a large number, because the BSC2 in the MSC1 service area also links to each other with MSC0, therefore, these users' business still can be born by MSC0, and it is just passable that MSC1 only needs to bear the load of local user's capacity, can realize load sharing and disaster tolerance that intra-office switches.
But, in the prior art, the user's inter-office switchover outside the pond in the pond during certain sub-district, process as shown in Figure 3, wherein MSC1 is source MSC, MSC1 is connection BSC1 and BSC2 down, BSC1 has sub-district 11, and sub-district C21 is arranged under the BSC2; The Pool Area adjacent with MSC1 comprises for supporting MSC pond in the A-Flex architecture network: MSC11, MSC12, MSC13, and BSC11, the BSC12, BSC13 and the BSC14 that connect, with and under sub-district C111, C121, C131 and C141.C21 and C111 are neighbor cells, and MS moves to C111 from C21, will stride the inter-office switchover of MSC.
When MS moves to C111 from C21, BSC2 detects C111, go up the neighbor cell configuration information of preserving by BSC2 and know that the MSC of C111 correspondence is MSC11, then BSC2 sends handoff request message to MSC1, and this message is carried the sign of switching target C111 and the sign of MSC11.Receive the handoff request message of BSC2 at MSC1 after, can only be according to the sign of the MSC11 in the handoff request message, to MSC11 transmitting apparatus Indication message.
Therefore as can be seen, even switching target small area is when supporting in the A-Flex architecture network in the pond certain sub-district in the prior art, target MSC can only be to fix a MSC, because the load of MSC is unknowable in the A-Flex architecture network, therefore this single switching target mechanism can not guarantee the load sharing of inter-office switchover.
Summary of the invention
In view of this, one embodiment of the present of invention provide a kind of changing method and switched system, when Target cell belongs under the A-Flex framework MSC pond, source MSC can be from a plurality of switching target MSC that are provided with select target MSC, guaranteed the load sharing of inter-office switchover.
A kind of changing method that one embodiment of the present of invention provide comprises:
When receiving the handoff request that comprises target cell information, the corresponding relation of MSC in the neighbor cell of the source MSC that source moving exchanging center MSC Network Search side is preserved and the neighbor cell ownership MSC pond, determine the target MSC of Target cell correspondence, indicate to the target MSC transmitting apparatus.
One embodiment of the present of invention also provide a kind of switched system, comprise MSC pond under the A-Flex framework at least, the MSC adjacent with the MSC pond, and wherein, the MSC adjacent with the MSC pond also comprises:
Memory cell: the corresponding relation that is used for preserving neighbor cell and its ownership MSC pond MSC;
Receiving element: be used to receive the handoff request that comprises target cell information, handoff request is sent to processing unit;
Processing unit: after being used to receive handoff request, search the corresponding relation that memory cell is preserved, determine the target MSC of Target cell correspondence from receiving element;
Transmitting element: the target MSC transmitting apparatus that is used for determining to processing unit is indicated.
By such scheme as can be seen, a kind of changing method and switched system that one embodiment of the present of invention provide, the deficiencies in the prior art have been overcome, when Target cell belongs under the A-Flex framework MSC pond, source MSC can be from a plurality of switching target MSC that are provided with select target MSC, guaranteed the load sharing of inter-office switchover.
Description of drawings
Fig. 1 is MSC and a BSC annexation schematic diagram in the CDMA2000 circuit domain in the prior art;
Fig. 2 is MSC and a BSC annexation schematic diagram under the A-Flex framework in the prior art;
Fig. 3 is an inter-office switchover schematic diagram in the prior art;
The schematic flow sheet of Fig. 4 embodiment of the invention 1;
The schematic flow sheet of Fig. 5 embodiment of the invention 2;
Fig. 6 is the embodiment of the invention 3 business process maps;
Fig. 7 is an inter-office switchover schematic diagram in the embodiment of the invention 4;
Fig. 8 is the embodiment of the invention 4 business process maps.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing.
Step 401: the neighbor cell of source MSC and the corresponding relation that neighbor cell belongs to MSC in the MSC pond are set.
Concrete, the MSC corresponding relation can be arranged in the configuration information table in the neighbor cell of source MSC and the neighbor cell ownership MSC pond.In configuration information table, be provided with each MSC sign (MSCID) in the ownership MSC pond of adjacent cell information and its correspondence; Perhaps be provided with the ownership MSC pond sign (MSCPOOLID) of adjacent cell information and its correspondence, identify (MSCID) with each MSC in MSCPOOLID and the corresponding MSC pond.Certainly configuration information table also can be taked other expression mode just as a kind of mode that each MSC corresponding relation in neighbor cell and the neighbor cell ownership MSC pond is set, and does not give unnecessary details at this.
Step 402: when receiving the handoff request that comprises target cell information, source MSC searches corresponding relation, knows each MSC of Target cell correspondence, determines target MSC according to predetermined policy from each MSC of Target cell correspondence.
Concrete, base station controller BSC sends handoff request to source MSC, carries target cell information in the handoff request, and this target cell information comprises Target Cell Identifier and Target cell ownership MSC sign.
After receiving handoff request, source MSC parses the target cell information that carries in the handoff request, searches corresponding relation according to target cell information, knows each MSC of target cell information correspondence; Source MSC determines target MSC according to predetermined policy from each MSC of target cell information correspondence.
Wherein, predetermined policy is for being various suitable algorithms, for example: adopt the mode of polling algorithm therefrom to select one to be target MSC in each MSC of target cell information correspondence.To each inter-office switchover request, in each MSC of target cell information correspondence, select in turn, as switching target.This algorithm guarantees that MSC that each signaling can reach equates as the probability of switching target.
The method of source MSC select target MSC also comprises: according to the load condition of MSC, select the minimum MSC of load.Select the minimum MSC of load more to help load sharing, make the load balancing between each MSC.Wherein, the algorithm about load sharing can also adopt any suitable algorithm in the prior art.
The method of source MSC select target MSC can also adopt optimization algorithm: to each inter-office switchover request, if the most preferred MSC signaling of configuration can reach, then select its switching target the most; Otherwise select the second preferred L SC as switching target, by that analogy.
Step 403: source MSC indicates to the target MSC transmitting apparatus.
Concrete, source MSC is structure equipment Indication message after determining target MSC, specifically comprises: if source MSC knows that by searching corresponding relation Target Cell Identifier is unique, carries Target Cell Identifier in the equipment Indication message in the MSC pond; Perhaps, if source MSC knows that by searching corresponding relation Target Cell Identifier is not unique in the MSC pond, in the equipment Indication message, carry Target Cell Identifier and Target cell ownership MSC sign.
Target MSC is finished switching after receiving the equipment Indication message.
Specifically comprise: after target MSC is received the equipment Indication message, in the MSC pond, determine target BS C, and send switch indicating information, finish switching to it.
In the present embodiment, step 501 is identical with step 401, and step 503 is identical with step 403, is not giving unnecessary details at this.
Step 502: when receiving the handoff request that comprises target cell information, source MSC searches corresponding relation, know each MSC of Target cell correspondence, whether signaling can reach each MSC of source MSC detection Target cell correspondence, selects the target MSC as the Target cell correspondence from the MSC that signaling can reach.
Concrete, base station controller BSC sends handoff request to source MSC, carries target cell information in the handoff request, and this target cell information comprises Target Cell Identifier and Target cell ownership MSC sign.
After receiving handoff request, source MSC parses the target cell information that carries in the handoff request, search corresponding relation according to target cell information, know each MSC of target cell information correspondence, whether signaling can reach each MSC of source MSC detection target cell information correspondence, and source MSC selects the target MSC as described Target cell correspondence according to predetermined policy from the MSC that signaling can reach.
Wherein said predetermined policy theoretically with method embodiment 1 step 402 in predetermined policy basic identical, all be with the method for selecting a destination object in a plurality of optional objects, difference is that the predetermined policy in the step 502 is a select target from the MSC that signaling detected.Predetermined policy among the method embodiment 2 does not repeat them here so.
Wherein, each MSC signaling of source MSC detection Target cell correspondence can reach situation can several different methods, for example, sets up handshake mechanism or obtain fault state by Link State is judged between source MSC each MSC corresponding with Target cell.If between source MSC each MSC corresponding, set up handshake mechanism, show when shaking hands success that then signaling can reach, and when shaking hands failure, show that signaling is unreachable with Target cell.Handshake is meant the signal of a series of mutual identifications, and described signal occurs in and communicates between the two computational devices or when transmitting information.
Source MSC also can be by judging to Link State whether obtain signaling can reach situation.For example, source MSC judges the Link State between each MSC corresponding with Target cell, and when the link between each MSC corresponding with Target cell by source MSC can arrive corresponding each the MSC signalling point of Target cell, source MSC judged that this signaling can reach; And when the link by source MSC each MSC corresponding with Target cell can not arrive corresponding each the MSC signalling point of Target cell, source MSC judged that this signaling is unreachable.
The Link State that obtains between source MSC and each MSC can also have several different methods, for example, can adopt MTP (the Message Transfer Part) module of NO.7 signaling specification to realize.Certainly also there is other method can realize this function, do not do at this and give unnecessary details.
Embodiment 3, are described in detail below in conjunction with the concrete application of the present invention in CDMA.Present embodiment relates to changing method, and in the present embodiment, the handoff procedure with MS from sub-district C21 inter-office switchover to sub-district C111 (as shown in Figure 3) is an example, and the handling process of this inter-office switchover is described.
Each MSC pond at first is described, MSC, the BSC logical relation, wherein MSC1 is for supporting the source MSC outside the MSC pond in the A-Flex architecture network, and MSC1 connects BSC1 and BSC2 down, and BSC1 has sub-district C11, and sub-district C21 is arranged under the BSC2; The Pool Area adjacent with MSC1 comprises for supporting MSC pond in the A-Flex architecture network: MSC11, MSC12, MSC13, and BSC11, the BSC12, BSC13 and the BSC14 that connect, with and under sub-district C111, C121, C131 and C141.The MSC pond that source MSC is adjacent has one, also has a plurality ofly, is example with one here.And source MSC may be the MSC that does not support in traditional mobile communications network of A-Flex architecture network, also can be to support the MSC in the another one pond in the A-Flex architecture network, but when Target cell belonged under the A-Flex framework MSC pond, its inter-office switchover Principle of Process was identical.
Configuration following configuration information table (A) on MSC1, preserve the corresponding relation of each MSC in neighbor cell and the neighbor cell ownership MSC pond, wherein adjacent cell information is neighbor cell sign and ownership MSC sign, this information can be specified by operator, be used for identifying cells information, and BSC1 and BSC2 go up the adjacent cell information of preserving and are consistent under this adjacent cell information and the MSC1.
(configuration information Table A)
Also can adopt following configuration information table (B) to preserve the corresponding relation of each MSC in all neighbor cells and its ownership MSC pond.
Configuration information table (B1)
| MSC pond sign | MSC11 sign in the MSC pond | MSC12 sign in the MSC pond | MSC13 sign in the MSC pond |
| MSC POOL ID | MSC11 ID | MSC12 ID | MSC13 ID |
| … | … | … |
Configuration information table (B2)
In the present embodiment, cell ID adopts following configuration structure under the Pool Area: all dispose the global cell table under the whole pond in the pond on each MSC, so in the network planning, require the cell ID of all sub-districts in the pond different, promptly require cell ID unique under the pond.At this moment, cell ID adopts the unique configuration structure of cell ID under the Pool Area, can only comprise cell ID in the equipment Indication message that MSC1 sends so, and target MSC is searched the global cell table by cell ID can find target BS C.
As shown in Figure 5, mainly may further comprise the steps:
Travelling carriage (Mobile Station is called for short " MS ") is inserted by BSC2, carries out business at MSC1.This MS need switch to the sub-district C111 under the BSC11 by moving.
Step 601:BSC2 detects and need switch to neighbor cell C111, goes up the neighbor cell configuration information of preserving by BSC2 and knows that the ownership MSC of C111 correspondence is MSC11, and the selected corresponding MSC of BSC2 is MSC11.BSC2 sends Handoff Required (handoff request) message to MSC1, carries the information of Target cell C111 in the message, i.e. the sign MSC11ID of cell ID C111ID+MSC11;
After step 602:MSC1 receives Handoff Required message, parse C111 ID+MSC11ID, MSC1 has three according to the MSC that configuration information table detects C111 ID+MSC11ID correspondence: MSC11, MSC12, MSC13, selected MSC12 is a target MSC by the polling algorithm.
Step 603:MSC1 finds that by searching configuration information table C111ID is unique in table, then MSC1 structure and transmission FACDIR2 (facility direction, equipment indication) message is given MSC12, has the sign of C111ID in this message.
Step 604:MSC12 receives FACDIR2 message, obtains the switching target C111ID in the message; Because cell ID is unique under the MSC pond, so determine unique switching target BSC11 according to C111ID.MSC12 sends Handoff Request (switching indication) message to BSC11, finishes the inter-office switchover process.
Embodiment 4, and present embodiment relates to changing method, and in the present embodiment, the handoff procedure with MS from sub-district C21 inter-office switchover to sub-district C111 (as shown in Figure 7) is an example, and the handling process of this inter-office switchover is described.The difference of the present embodiment and first embodiment is that in the present embodiment, cell ID adopts following configuration structure under the Pool Area: cell ID is reusable under the pond, and promptly cell ID is not unique in Pool Area.To each BSC in the pond, a MSC in the selection pond is as the subordinate MSC in logic of BSC.Require in the configuration under the same subordinate MSC, the sub-district of its logic subordinate all has different cell IDs; And between subordinate MSC, the sub-district of each subordinate MSC logic subordinate can have identical cell ID, i.e. cell ID reusable under the MSC pond.Concrete: BSC11 is subordinate MSC11 in logic, and BSC12, BSC13 be subordinate MSC12 in logic, and BSC14 is subordinate MSC13 in logic.
Configuration following configuration information table (C) on MSC1, preserve the corresponding relation of each MSC in neighbor cell and the neighbor cell ownership MSC pond: wherein adjacent cell information is neighbor cell sign and ownership MSC sign, this information can be specified by operator, and BSC1 and BSC2 go up the adjacent cell information of preserving and be consistent under this adjacent cell information and the MSC1.
Configuration information table (C)
If, cell ID adopts cell ID reusable configuration structure under the Pool Area, need to comprise cell ID and subordinate MSCID in the handoff request message so in the equipment Indication message that MSC1 sends, target MSC can find switching target BSC by cell ID and MSCID.
Switching target belongs to the inter-office switchover flow process in the reusable MSC of cell ID pond, specifically, and as shown in Figure 8,
Step 801:BSC2 detects and need switch to neighbor cell C111, goes up the neighbor cell configuration information of preserving by BSC2 and knows that the ownership MSC of C111 correspondence is MSC11, and the selected corresponding MSC of BSC2 is MSC11.BSC2 sends Handoff Required (handoff request) message to MSC1, carries the information of Target cell C111 in the message, i.e. the sign MSC11ID of cell ID C111 ID+MSC11;
Step 802:MSC1 parses C111 ID+MSC11ID after receiving Handoff Required message, and MSC1 has three according to the MSC that configuration information table detects C111 ID+MSC11ID correspondence: MSC11, MSC12, MSC13.MSC1 by handshake mechanism detect MSC11, MSC12, the equal signaling of MSC13 can reach, and is target MSC if this switches selected selected MSC12.
Step 803:MSC1 finds that by searching configuration information table C111ID is reusable, and then MSC1 structure and transmission FACDIR2 message have C111ID+MSC11ID to MSC12 in this message.
Step 804:MSC12 receives FACDIR2 message, obtains the C111ID+MSC11ID in the message; Navigate to unique switching target BSC11 according to C111ID+MSC11ID, MSC12 sends Handoff Request message to BSC11, finishes the inter-office switchover process.
Need illustrate, in the WCDMA technical field, Iu-Flex (Iu interface Flexibility Iu interface flexibleization corresponding to said A-Flex above, all is the flexibility of interface between Access Network and the circuit domain core net) has become standardized technology after Release 5.The application of changing method provided by the invention and mobile switching centre comprise global system for mobile communications (Global System For MobileCommunication, GSM), the WCDMA system.As in the WCDMA field, (Radio Network Control RNC) replaces BSC, and its principle is identical, repeats no more herein by radio network controller.
The described several preferred embodiment that neutralizes of detailed description in front; purpose of the present invention, technical scheme and beneficial effect are further described; institute is understood that; the above only is specific embodiments of the invention; be not limited to the present invention; within the spirit and principles in the present invention all, any modification of being made, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (14)
1. a changing method is characterized in that, this method comprises:
When receiving the handoff request that comprises target cell information, the corresponding relation of MSC in the neighbor cell of the described source MSC that source moving exchanging center MSC Network Search side is preserved and the described neighbor cell ownership MSC pond, determine the target MSC of described Target cell correspondence, to described target MSC transmitting apparatus indication.
2. method according to claim 1 is characterized in that, determines the target MSC of described Target cell correspondence, specifically comprises: find out among each MSC of described Target cell correspondence at described source MSC, select the target MSC as described Target cell correspondence.
3. method according to claim 2 is characterized in that, the step of select target MSC is: select in turn in described source MSC finds out each MSC of described Target cell correspondence; Perhaps,
Find out the load condition of each MSC of described Target cell correspondence according to described source MSC, select load minimum.
4. method according to claim 1, it is characterized in that, further comprise: find out among each MSC of described Target cell correspondence at described source MSC, source MSC detects each MSC of described Target cell correspondence, and whether signaling can reach, and selects the target MSC as described Target cell correspondence from the MSC that signaling can reach.
5. method according to claim 4 is characterized in that, described source MSC detects each MSC of described Target cell correspondence, and whether signaling can reach, and comprising:
Link State according between described source MSC each MSC corresponding with described Target cell determines whether that signaling can reach; Perhaps,
Set up handshake operation between described source MSC each MSC corresponding, when handshake operation is failed, determine that signaling is unreachable with described Target cell.
6. method according to claim 4 is characterized in that, the step of select target MSC is:
In the MSC that described signaling can reach, select in turn; Perhaps,
The load condition of the MSC that can reach according to described signaling selects load minimum.
7. according to each described method in the claim 1 to 6, it is characterized in that, at network side the neighbor cell of described source MSC and the corresponding relation that described neighbor cell belongs to MSC in the MSC pond are set in advance.
8. method according to claim 7 is characterized in that, the MSC correspondence setting is in configuration information table in the neighbor cell of described source MSC and the described neighbor cell ownership MSC pond;
In described configuration information table, each MSC sign in the ownership MSC pond of described adjacent cell information and its correspondence is set; Perhaps,
In described configuration information table, the ownership MSC pond sign of described adjacent cell information and its correspondence is set, identify with each MSC in described ownership MSC pond sign and the corresponding MSC pond.
9. method according to claim 8 is characterized in that, receives before the handoff request that comprises target cell information, further comprises:
Base station controller BSC sends handoff request to described source MSC, carries Target Cell Identifier and Target cell ownership MSC sign in the described handoff request.
10. method according to claim 9 is characterized in that, knows that described Target Cell Identifier is unique if described source MSC searches described corresponding relation in described MSC pond, then carries described Target Cell Identifier in the equipment indication;
Know that described Target Cell Identifier is not unique if described source MSC searches described corresponding relation in described MSC pond, then in the equipment indication, carry described Target Cell Identifier and described Target cell ownership MSC sign.
11. method according to claim 10 is characterized in that, further comprises:
Described target MSC is determined target BS C after receiving described equipment indication in described MSC pond, and sends the switching indication to it, finishes switching.
12. a switched system comprises MSC pond under the A-Flex framework at least, the MSC adjacent with the MSC pond is characterized in that, the described MSC adjacent with the MSC pond also comprises:
Memory cell: the corresponding relation that is used for preserving neighbor cell and its ownership MSC pond MSC;
Receiving element: be used to receive the handoff request that comprises target cell information, described handoff request is sent to processing unit;
Processing unit: after being used to receive handoff request, search the corresponding relation that memory cell is preserved, determine the target MSC of described Target cell correspondence from receiving element;
Transmitting element: the target MSC transmitting apparatus that is used for determining to processing unit is indicated.
13. switched system as claimed in claim 12 is characterized in that, processing unit further comprises:
Policy unit: be used to store selection strategy;
Selected cell: be used to receive the selection strategy that policy unit sends, and according to described selection strategy in described each MSC that finds out described Target cell correspondence, select a target MSC as described Target cell correspondence.
14. switched system as claimed in claim 12 is characterized in that, processing unit further comprises:
Detecting unit: whether signaling can reach to be used to detect each MSC of described Target cell correspondence;
Policy unit: be used to store selection strategy;
Selected cell: be used to receive the selection strategy that policy unit sends, and detect the MSC that all signalings can reach from detecting unit according to described selection strategy and to select a target MSC as described Target cell correspondence.
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| CN101945451A (en) * | 2010-09-30 | 2011-01-12 | 上海华为技术有限公司 | Method, system and controller for switching cells |
| CN102158916A (en) * | 2011-02-16 | 2011-08-17 | 华为技术有限公司 | Group calling interoffice switching method, device and system |
| CN101895932B (en) * | 2009-05-19 | 2013-01-23 | 中国移动通信集团公司 | Load transferring method, system and device |
| CN103023772A (en) * | 2012-09-14 | 2013-04-03 | 中兴国通通讯装备技术（北京）有限公司 | Soft terminal supporting multiple Flex channels and self-adapting dynamic access method thereof |
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| CN102158916A (en) * | 2011-02-16 | 2011-08-17 | 华为技术有限公司 | Group calling interoffice switching method, device and system |
| CN103023772A (en) * | 2012-09-14 | 2013-04-03 | 中兴国通通讯装备技术（北京）有限公司 | Soft terminal supporting multiple Flex channels and self-adapting dynamic access method thereof |
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| CN103619039B (en) * | 2013-12-09 | 2016-11-23 | 中国联合网络通信集团有限公司 | Servicing end office's equipment reselection method and servicing end office's equipment under the group framework of pond |
| WO2015154247A1 (en) * | 2014-04-09 | 2015-10-15 | 华为技术有限公司 | Method and apparatus for neighbor cell addition |
| WO2016201973A1 (en) * | 2015-06-19 | 2016-12-22 | 中兴通讯股份有限公司 | Disaster tolerance method and apparatus, and communication system |
| CN106330415A (en) * | 2015-06-19 | 2017-01-11 | 中兴通讯股份有限公司 | Disaster tolerance method and device and communication system |
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| CN101212772B (en) | 2011-03-30 |
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